From 1bbe09df9492378fe2f8d71271f33d721c6eee9d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E5=8B=A4=E4=B8=BA=E6=9C=AC?= <1207280597@qq.com> Date: Tue, 7 Nov 2017 16:47:39 +0800 Subject: [PATCH] =?UTF-8?q?=E6=8A=8A=E9=BE=99=E8=8A=AF1c=E7=9A=84SPI?= =?UTF-8?q?=E6=8E=A5=E5=8F=A3=E6=94=B9=E4=B8=BARTT=E7=BB=9F=E4=B8=80?= =?UTF-8?q?=E7=9A=84SPI=E6=8E=A5=E5=8F=A3?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- bsp/ls1cdev/drivers/drv_spi.c | 229 +++++++++++++++++++++++++++++++ bsp/ls1cdev/drivers/drv_spi.h | 55 ++++++++ bsp/ls1cdev/drivers/led.c | 40 ------ bsp/ls1cdev/drivers/led.h | 27 ---- bsp/ls1cdev/libraries/ls1c_spi.c | 141 ++++--------------- bsp/ls1cdev/libraries/ls1c_spi.h | 96 +++++++++---- bsp/ls1cdev/rtconfig.h | 5 + 7 files changed, 389 insertions(+), 204 deletions(-) create mode 100644 bsp/ls1cdev/drivers/drv_spi.c create mode 100644 bsp/ls1cdev/drivers/drv_spi.h delete mode 100644 bsp/ls1cdev/drivers/led.c delete mode 100644 bsp/ls1cdev/drivers/led.h diff --git a/bsp/ls1cdev/drivers/drv_spi.c b/bsp/ls1cdev/drivers/drv_spi.c new file mode 100644 index 0000000000..b26de557db --- /dev/null +++ b/bsp/ls1cdev/drivers/drv_spi.c @@ -0,0 +1,229 @@ +/* + * File : drv_spi.c + * This file is part of RT-Thread RTOS + * COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Change Logs: + * Date Author Notes + * 2017-11-02 勤为本 first version + */ + +#include +#include +#include "drv_spi.h" + + +//#define DEBUG + +#ifdef DEBUG +#define DEBUG_PRINTF(...) rt_kprintf(__VA_ARGS__) +#else +#define DEBUG_PRINTF(...) +#endif + + +static rt_err_t configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration); +static rt_uint32_t xfer(struct rt_spi_device *device, struct rt_spi_message *message); + + +static struct rt_spi_ops ls1c_spi_ops = +{ + .configure = configure, + .xfer = xfer +}; + + +static rt_err_t configure(struct rt_spi_device *device, + struct rt_spi_configuration *configuration) +{ + struct rt_spi_bus *spi_bus = NULL; + struct ls1c_spi *ls1c_spi = NULL; + unsigned char SPIx = 0; + void *spi_base = NULL; + unsigned char cpol = 0; + unsigned char cpha = 0; + unsigned char val = 0; + + RT_ASSERT(NULL != device); + RT_ASSERT(NULL != configuration); + + spi_bus = device->bus; + ls1c_spi = (struct ls1c_spi *)spi_bus->parent.user_data; + SPIx = ls1c_spi->SPIx; + spi_base = ls1c_spi_get_base(SPIx); + + { + // 使能SPI控制器，master模式，关闭中断 + reg_write_8(0x53, spi_base + LS1C_SPI_SPCR_OFFSET); + + // 清空状态寄存器 + reg_write_8(0xc0, spi_base + LS1C_SPI_SPSR_OFFSET); + + // 1字节产生中断，采样(读)与发送(写)时机同时 + reg_write_8(0x03, spi_base + LS1C_SPI_SPER_OFFSET); + + // 关闭SPI flash + val = reg_read_8(spi_base + LS1C_SPI_SFC_PARAM_OFFSET); + val &= 0xfe; + reg_write_8(val, spi_base + LS1C_SPI_SFC_PARAM_OFFSET); + + // spi flash时序控制寄存器 + reg_write_8(0x05, spi_base + LS1C_SPI_SFC_TIMING_OFFSET); + } + + // baudrate + ls1c_spi_set_clock(spi_base, configuration->max_hz); + + // 设置通信模式(时钟极性和相位) + if (configuration->mode & RT_SPI_CPOL) // cpol + { + cpol = SPI_CPOL_1; + } + else + { + cpol = SPI_CPOL_0; + } + if (configuration->mode & RT_SPI_CPHA) // cpha + { + cpha = SPI_CPHA_1; + } + else + { + cpha = SPI_CPHA_0; + } + ls1c_spi_set_mode(spi_base, cpol, cpha); + + DEBUG_PRINTF("ls1c spi%d configuration\n", SPIx); + + return RT_EOK; +} + + +static rt_uint32_t xfer(struct rt_spi_device *device, + struct rt_spi_message *message) +{ + struct rt_spi_bus *spi_bus = NULL; + struct ls1c_spi *ls1c_spi = NULL; + void *spi_base = NULL; + unsigned char SPIx = 0; + struct ls1c_spi_cs *ls1c_spi_cs = NULL; + unsigned char cs = 0; + rt_uint32_t size = 0; + const rt_uint8_t *send_ptr = NULL; + rt_uint8_t *recv_ptr = NULL; + rt_uint8_t data = 0; + + RT_ASSERT(NULL != device); + RT_ASSERT(NULL != message); + + spi_bus = device->bus; + ls1c_spi = spi_bus->parent.user_data; + SPIx = ls1c_spi->SPIx; + spi_base = ls1c_spi_get_base(SPIx); + ls1c_spi_cs = device->parent.user_data; + cs = ls1c_spi_cs->cs; + size = message->length; + + DEBUG_PRINTF("[%s] SPIx=%d, cs=%d\n", __FUNCTION__, SPIx, cs); + + // take cs + if (message->cs_take) + { + ls1c_spi_set_cs(spi_base, cs, 0); + } + + // 收发数据 + send_ptr = message->send_buf; + recv_ptr = message->recv_buf; + while (size--) + { + data = 0xFF; + if (NULL != send_ptr) + { + data = *send_ptr++; + } + + if (NULL != recv_ptr) + { + *recv_ptr++ = ls1c_spi_txrx_byte(spi_base, data); + } + else + { + ls1c_spi_txrx_byte(spi_base, data); + } + } + + // release cs + if (message->cs_release) + { + ls1c_spi_set_cs(spi_base, cs, 1); + } + + return message->length; +} + + +#ifdef RT_USING_SPI0 +struct ls1c_spi ls1c_spi0 = +{ + .SPIx = LS1C_SPI_0, +}; + +static struct rt_spi_bus spi0_bus; +#endif + + +#ifdef RT_USING_SPI1 +struct ls1c_spi ls1c_spi1 = +{ + .SPIx = LS1C_SPI_1, +}; + +static struct rt_spi_bus spi1_bus; +#endif + + +/* + * 初始化并注册龙芯1c的spi总线 + * @SPI SPI总线，比如LS1C_SPI_0， LS1C_SPI_1 + * @spi_bus_name 总线名字 + * @ret + */ +rt_err_t ls1c_spi_bus_register(rt_uint8_t SPI, const char *spi_bus_name) +{ + struct rt_spi_bus *spi_bus = NULL; + +#ifdef RT_USING_SPI0 + if (LS1C_SPI_0 == SPI) + { + spi_bus = &spi0_bus; + spi_bus->parent.user_data = &ls1c_spi0; + } +#endif + +#ifdef RT_USING_SPI1 + if (LS1C_SPI_1 == SPI) + { + spi_bus = &spi1_bus; + spi_bus->parent.user_data = &ls1c_spi1; + } +#endif + + return rt_spi_bus_register(spi_bus, spi_bus_name, &ls1c_spi_ops); +} + + diff --git a/bsp/ls1cdev/drivers/drv_spi.h b/bsp/ls1cdev/drivers/drv_spi.h new file mode 100644 index 0000000000..94fbb58097 --- /dev/null +++ b/bsp/ls1cdev/drivers/drv_spi.h @@ -0,0 +1,55 @@ +/* + * File : drv_spi.h + * This file is part of RT-Thread RTOS + * COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Change Logs: + * Date Author Notes + * 2017-11-02 勤为本 first version + */ + +#ifndef LS1C_DRV_SPI_H +#define LS1C_DRV_SPI_H + + +#include "../libraries/ls1c_spi.h" + + +struct ls1c_spi +{ + unsigned char SPIx; // LS1C_SPI_0 or LS1C_SPI_1 +}; + + +struct ls1c_spi_cs +{ + unsigned char cs; // LS1C_SPI_CS_0, LS1C_SPI_CS_1, LS1C_SPI_CS_2 or LS1C_SPI_CS_3 +}; + + + +/* + * 初始化并注册龙芯1c的spi总线 + * @SPI SPI总线，比如LS1C_SPI_0， LS1C_SPI_1 + * @spi_bus_name 总线名字 + * @ret + */ +rt_err_t ls1c_spi_bus_register(rt_uint8_t SPI, const char *spi_bus_name); + + +#endif + diff --git a/bsp/ls1cdev/drivers/led.c b/bsp/ls1cdev/drivers/led.c deleted file mode 100644 index 6f73ac9892..0000000000 --- a/bsp/ls1cdev/drivers/led.c +++ /dev/null @@ -1,40 +0,0 @@ -// led接口 -// 使用低电平点亮led，高电平熄灭led - - -#include "ls1c_gpio.h" - - -// 初始化led -// @led_gpio led所在gpio引脚 -void led_init(unsigned int led_gpio) -{ - gpio_init(led_gpio, gpio_mode_output); - gpio_set(led_gpio, gpio_level_high); // 指示灯默认熄灭 - - return ; -} - - -// 点亮led -// @led_gpio led所在gpio引脚 -void led_on(unsigned int led_gpio) -{ - gpio_set(led_gpio, gpio_level_low); - - return ; -} - - -// 熄灭led -// @led_gpio -void led_off(unsigned int led_gpio) -{ - gpio_set(led_gpio, gpio_level_high); - - return ; -} - - - - diff --git a/bsp/ls1cdev/drivers/led.h b/bsp/ls1cdev/drivers/led.h deleted file mode 100644 index 76ea905371..0000000000 --- a/bsp/ls1cdev/drivers/led.h +++ /dev/null @@ -1,27 +0,0 @@ -// led接口 -// 使用低电平点亮led，高电平熄灭led - -#ifndef __OPENLOONGSON_LED_H -#define __OPENLOONGSON_LED_H - - -// 初始化led -// @led_gpio led所在gpio引脚 -void led_init(unsigned int led_gpio); - - -// 点亮led -// @led_gpio led所在gpio引脚 -void led_on(unsigned int led_gpio); - - -// 熄灭led -// @led_gpio -void led_off(unsigned int led_gpio); - - - - - -#endif - diff --git a/bsp/ls1cdev/libraries/ls1c_spi.c b/bsp/ls1cdev/libraries/ls1c_spi.c index 8547626c30..7da50e1c37 100644 --- a/bsp/ls1cdev/libraries/ls1c_spi.c +++ b/bsp/ls1cdev/libraries/ls1c_spi.c @@ -32,53 +32,13 @@ #include "ls1c_spi.h" -// 寄存器偏移 -#define LS1C_SPI_SPCR_OFFSET (0) // 控制寄存器 -#define LS1C_SPI_SPSR_OFFSET (1) // 状态寄存器 -#define LS1C_SPI_TxFIFO_OFFSET (2) // 发送的数据寄存器，与接收数据寄存器的偏移相同 -#define LS1C_SPI_RxFIFO_OFFSET (2) // 接收的数据寄存器，与发送数据寄存器的偏移相同 -#define LS1C_SPI_SPER_OFFSET (3) // 外部寄存器 -#define LS1C_SPI_SFC_PARAM_OFFSET (4) // 参数控制寄存器 -#define LS1C_SPI_SFC_SOFTCS_OFFSET (5) // 片选控制寄存器 -#define LS1C_SPI_SFC_TIMING_OFFSET (6) // 时序控制寄存器 - -// 寄存器SPCR中的位域 -#define LS1C_SPI_SPCR_SPIE_BIT (7) -#define LS1C_SPI_SPCR_SPIE_MASK (0x01 << LS1C_SPI_SPCR_SPIE_BIT) -#define LS1C_SPI_SPCR_SPE_BIT (6) -#define LS1C_SPI_SPCR_SPE_MASK (0x01 << LS1C_SPI_SPCR_SPE_BIT) -#define LS1C_SPI_SPCR_CPOL_BIT (3) -#define LS1C_SPI_SPCR_CPOL_MASK (0x01 << LS1C_SPI_SPCR_CPOL_BIT) -#define LS1C_SPI_SPCR_CPHA_BIT (2) -#define LS1C_SPI_SPCR_CPHA_MASK (0x01 << LS1C_SPI_SPCR_CPHA_BIT) -#define LS1C_SPI_SPCR_SPR_BIT (0) -#define LS1C_SPI_SPCR_SPR_MASK (0x03 << LS1C_SPI_SPCR_SPR_BIT) - -// 寄存器SPSR中的位域 -#define LS1C_SPI_SPSR_SPIF_BIT (7) -#define LS1C_SPI_SPSR_SPIF_MASK (0x01 << LS1C_SPI_SPSR_SPIF_BIT) -#define LS1C_SPI_SPSR_WCOL_BIT (6) -#define LS1C_SPI_SPSR_WCOL_MASK (0x01 << LS1C_SPI_SPSR_WCOL_BIT) - -// 寄存器SPER中的位域 -#define LS1C_SPI_SPER_SPRE_BIT (0) -#define LS1C_SPI_SPER_SPRE_MASK (0x3 << LS1C_SPI_SPER_SPRE_BIT) - -// 寄存器SFC_SOFTCS的位域 -#define LS1C_SPI_SFC_SOFTCS_CSN_BIT (4) -#define LS1C_SPI_SFC_SOFTCS_CSN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSN_BIT) -#define LS1C_SPI_SFC_SOFTCS_CSEN_BIT (0) -#define LS1C_SPI_SFC_SOFTCS_CSEN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSEN_BIT) - -// 发送超时的门限值 -#define LS1C_SPI_TX_TIMEOUT (20000) /* * 获取指定SPI模块的基地址 * @SPIx SPI模块的编号 */ -inline void *spi_get_base(ls1c_spi_t SPIx) +inline void *ls1c_spi_get_base(unsigned char SPIx) { void *base = NULL; @@ -103,15 +63,12 @@ inline void *spi_get_base(ls1c_spi_t SPIx) /* * 打印指定SPI模块的所有寄存器的值 - * @spi_info_p SPI模块信息 + * @spi_base 基地址 */ -void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p) +void ls1c_spi_print_all_regs_info(void *spi_base) { - void *spi_base = spi_get_base(spi_info_p->SPIx); - - rt_kprintf("[%s] SPI%d's info:\r\n\ - SPCR=0x%x, SPSR=0x%x, SPER=0x%x, SFC_PARAM=0x%x, SFC_SOFTCS=0x%x, SFC_TIMING=0x%x\r\n", - __FUNCTION__, spi_info_p->SPIx, + rt_kprintf("[%s] SPCR=0x%x, SPSR=0x%x, SPER=0x%x, SFC_PARAM=0x%x, SFC_SOFTCS=0x%x, SFC_TIMING=0x%x\r\n", + __FUNCTION__, reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET), reg_read_8(spi_base + LS1C_SPI_SPSR_OFFSET), reg_read_8(spi_base + LS1C_SPI_SPER_OFFSET), @@ -128,7 +85,7 @@ void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p) * @max_speed_hz SPI最大通信速度 * @ret 分频系数 */ -unsigned int spi_get_div(unsigned int max_speed_hz) +unsigned int ls1c_spi_get_div(unsigned int max_speed_hz) { unsigned long clk = 0; unsigned int div = 0; @@ -189,16 +146,16 @@ unsigned int spi_get_div(unsigned int max_speed_hz) /* * 设置时钟 - * @spi_info_p SPI模块信息 + * @spi_base 基地址 + * @max_hz 最大频率，单位hz */ -void spi_set_clock(ls1c_spi_info_t *spi_info_p) +void ls1c_spi_set_clock(void *spi_base, unsigned long max_hz) { - void *spi_base = spi_get_base(spi_info_p->SPIx); unsigned int div = 0; unsigned char val = 0; // 获取分频系数 - div = spi_get_div(spi_info_p->max_speed_hz); + div = ls1c_spi_get_div(max_hz); // 设置spr val = reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET); @@ -218,22 +175,23 @@ void spi_set_clock(ls1c_spi_info_t *spi_info_p) /* * 设置通信模式(时钟极性和相位) - * @spi_info_p SPI模块信息 + * @spi_base 基地址 + * @cpol 时钟极性 + * @cpha 时钟相位 */ -void spi_set_mode(ls1c_spi_info_t *spi_info_p) +void ls1c_spi_set_mode(void *spi_base, unsigned char cpol, unsigned char cpha) { - void *spi_base = spi_get_base(spi_info_p->SPIx); unsigned char val = 0; val = reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET); // 设置时钟极性--cpol - val &= (~LS1C_SPI_SPCR_CPOL_MASK); // cpol清0 - val |= (spi_info_p->cpol << LS1C_SPI_SPCR_CPOL_BIT); // 写入新的cpol + val &= (~LS1C_SPI_SPCR_CPOL_MASK); // cpol清0 + val |= (cpol << LS1C_SPI_SPCR_CPOL_BIT); // 写入新的cpol // 设置时钟相位--cpha - val &= (~LS1C_SPI_SPCR_CPHA_MASK); // cpha清0 - val |= (spi_info_p->cpha << LS1C_SPI_SPCR_CPHA_BIT); // 写入新的cpha + val &= (~LS1C_SPI_SPCR_CPHA_MASK); // cpha清0 + val |= (cpha << LS1C_SPI_SPCR_CPHA_BIT); // 写入新的cpha reg_write_8(val, spi_base + LS1C_SPI_SPCR_OFFSET); @@ -243,13 +201,12 @@ void spi_set_mode(ls1c_spi_info_t *spi_info_p) /* * 设置指定片选为指定状态 - * @spi_info_p SPI模块信息 + * @spi_base 基地址 + * @cs 片选 * @new_status 片选引脚的新状态，取值为0或1，即高电平或低电平 */ -void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status) +void ls1c_spi_set_cs(void *spi_base, unsigned char cs, int new_status) { - void *spi_base = spi_get_base(spi_info_p->SPIx); - unsigned char cs = spi_info_p->cs; unsigned char val = 0; val = 0xf0 | (0x01 << cs); // 全部csn=1，指定的csen=1 @@ -267,51 +224,12 @@ void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status) } -/* - * 初始化指定SPI模块 - * @spi_info_p SPI模块信息 - */ -void spi_init(ls1c_spi_info_t *spi_info_p) -{ - void *spi_base = spi_get_base(spi_info_p->SPIx); - unsigned char val = 0; - - // 使能SPI控制器，master模式，关闭中断 - reg_write_8(0x53, spi_base + LS1C_SPI_SPCR_OFFSET); - - // 清空状态寄存器 - reg_write_8(0xc0, spi_base + LS1C_SPI_SPSR_OFFSET); - - // 1字节产生中断，采样(读)与发送(写)时机同时 - reg_write_8(0x03, spi_base + LS1C_SPI_SPER_OFFSET); - - // 关闭SPI flash - val = reg_read_8(spi_base + LS1C_SPI_SFC_PARAM_OFFSET); - val &= 0xfe; - reg_write_8(val, spi_base + LS1C_SPI_SFC_PARAM_OFFSET); - - // spi flash时序控制寄存器 - reg_write_8(0x05, spi_base + LS1C_SPI_SFC_TIMING_OFFSET); - - // 设置时钟 - spi_set_clock(spi_info_p); - - // 设置通信模式(时钟极性和相位) - spi_set_mode(spi_info_p); - - // 打印寄存器信息(用于调试) -// spi_print_all_regs_info(spi_info_p); - - return ; -} - - /* * 等待收发完成 + * @spi_base 基地址 */ -inline void spi_wait_txrx_done(ls1c_spi_info_t *spi_info_p) +inline void ls1c_spi_wait_txrx_done(void *spi_base) { - void *spi_base = spi_get_base(spi_info_p->SPIx); int timeout = LS1C_SPI_TX_TIMEOUT; while (timeout--) @@ -326,10 +244,10 @@ inline void spi_wait_txrx_done(ls1c_spi_info_t *spi_info_p) /* * 清中断和标志位 + * @spi_base 基地址 */ -inline void spi_clear(ls1c_spi_info_t *spi_info_p) +inline void ls1c_spi_clear(void *spi_base) { - void *spi_base = spi_get_base(spi_info_p->SPIx); unsigned char val = 0; // 清中断 @@ -356,20 +274,19 @@ inline void spi_clear(ls1c_spi_info_t *spi_info_p) * 注意，在多任务的系统中，此函数需要互斥。 * 即保证在和某个从设备收发某个字节的过程中，不能被切换到其它任务同时与另外的在同一个SPI总线上的从设备通信 * 因为龙芯1c的每路SPI上可能接有不同的从设备，通信频率、模式等可能不同 - * @spi_info_p SPI接口 + * @spi_base 基地址 * @tx_ch 待发送的数据 * @ret 收到的数据 */ -unsigned char spi_txrx_byte(ls1c_spi_info_t *spi_info_p, unsigned char tx_ch) +unsigned char ls1c_spi_txrx_byte(void *spi_base, unsigned char tx_ch) { - void *spi_base = spi_get_base(spi_info_p->SPIx); unsigned char rx_ch = 0; // 收发数据 reg_write_8(tx_ch, spi_base + LS1C_SPI_TxFIFO_OFFSET); // 开始发送 - spi_wait_txrx_done(spi_info_p); // 等待收发完成 + ls1c_spi_wait_txrx_done(spi_base); // 等待收发完成 rx_ch = reg_read_8(spi_base + LS1C_SPI_RxFIFO_OFFSET); // 读取收到的数据 - spi_clear(spi_info_p); // 清中断和标志位 + ls1c_spi_clear(spi_base); // 清中断和标志位 return rx_ch; } diff --git a/bsp/ls1cdev/libraries/ls1c_spi.h b/bsp/ls1cdev/libraries/ls1c_spi.h index 6b041b19c1..8046127de7 100644 --- a/bsp/ls1cdev/libraries/ls1c_spi.h +++ b/bsp/ls1cdev/libraries/ls1c_spi.h @@ -29,15 +29,10 @@ // SPI模块编号 -typedef enum -{ - LS1C_SPI_0 = 0, - LS1C_SPI_1, -}ls1c_spi_t; - +#define LS1C_SPI_0 (0) +#define LS1C_SPI_1 (1) // 片选 -#define LS1C_SPI_INVALID_CS (-1) #define LS1C_SPI_CS_0 (0) #define LS1C_SPI_CS_1 (1) #define LS1C_SPI_CS_2 (2) @@ -50,31 +45,80 @@ typedef enum #define SPI_CPHA_0 (0) -// 硬件SPI信息 -typedef struct -{ - ls1c_spi_t SPIx; // SPI模块编号 - unsigned long max_speed_hz; // 最大通信速度，单位hz - unsigned char cs; // 片选 - unsigned char cpol; // 时钟极性 - unsigned char cpha; // 时钟相位 -}ls1c_spi_info_t; +// 寄存器偏移 +#define LS1C_SPI_SPCR_OFFSET (0) // 控制寄存器 +#define LS1C_SPI_SPSR_OFFSET (1) // 状态寄存器 +#define LS1C_SPI_TxFIFO_OFFSET (2) // 发送的数据寄存器，与接收数据寄存器的偏移相同 +#define LS1C_SPI_RxFIFO_OFFSET (2) // 接收的数据寄存器，与发送数据寄存器的偏移相同 +#define LS1C_SPI_SPER_OFFSET (3) // 外部寄存器 +#define LS1C_SPI_SFC_PARAM_OFFSET (4) // 参数控制寄存器 +#define LS1C_SPI_SFC_SOFTCS_OFFSET (5) // 片选控制寄存器 +#define LS1C_SPI_SFC_TIMING_OFFSET (6) // 时序控制寄存器 + +// 寄存器SPCR中的位域 +#define LS1C_SPI_SPCR_SPIE_BIT (7) +#define LS1C_SPI_SPCR_SPIE_MASK (0x01 << LS1C_SPI_SPCR_SPIE_BIT) +#define LS1C_SPI_SPCR_SPE_BIT (6) +#define LS1C_SPI_SPCR_SPE_MASK (0x01 << LS1C_SPI_SPCR_SPE_BIT) +#define LS1C_SPI_SPCR_CPOL_BIT (3) +#define LS1C_SPI_SPCR_CPOL_MASK (0x01 << LS1C_SPI_SPCR_CPOL_BIT) +#define LS1C_SPI_SPCR_CPHA_BIT (2) +#define LS1C_SPI_SPCR_CPHA_MASK (0x01 << LS1C_SPI_SPCR_CPHA_BIT) +#define LS1C_SPI_SPCR_SPR_BIT (0) +#define LS1C_SPI_SPCR_SPR_MASK (0x03 << LS1C_SPI_SPCR_SPR_BIT) + +// 寄存器SPSR中的位域 +#define LS1C_SPI_SPSR_SPIF_BIT (7) +#define LS1C_SPI_SPSR_SPIF_MASK (0x01 << LS1C_SPI_SPSR_SPIF_BIT) +#define LS1C_SPI_SPSR_WCOL_BIT (6) +#define LS1C_SPI_SPSR_WCOL_MASK (0x01 << LS1C_SPI_SPSR_WCOL_BIT) + +// 寄存器SPER中的位域 +#define LS1C_SPI_SPER_SPRE_BIT (0) +#define LS1C_SPI_SPER_SPRE_MASK (0x3 << LS1C_SPI_SPER_SPRE_BIT) + +// 寄存器SFC_SOFTCS的位域 +#define LS1C_SPI_SFC_SOFTCS_CSN_BIT (4) +#define LS1C_SPI_SFC_SOFTCS_CSN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSN_BIT) +#define LS1C_SPI_SFC_SOFTCS_CSEN_BIT (0) +#define LS1C_SPI_SFC_SOFTCS_CSEN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSEN_BIT) + +// 发送超时的门限值 +#define LS1C_SPI_TX_TIMEOUT (20000) + + +/* + * 获取指定SPI模块的基地址 + * @SPIx SPI模块的编号 + */ +inline void *ls1c_spi_get_base(unsigned char SPIx); /* - * 初始化指定SPI模块 - * @spi_info_p SPI模块信息 + * 设置时钟 + * @spi_base 基地址 + * @max_hz 最大频率，单位hz */ -void spi_init(ls1c_spi_info_t *spi_info_p); +void ls1c_spi_set_clock(void *spi_base, unsigned long max_hz); + + +/* + * 设置通信模式(时钟极性和相位) + * @spi_base 基地址 + * @cpol 时钟极性 + * @cpha 时钟相位 + */ +void ls1c_spi_set_mode(void *spi_base, unsigned char cpol, unsigned char cpha); /* * 设置指定片选为指定状态 - * @spi_info_p SPI模块信息 + * @spi_base 基地址 + * @cs 片选 * @new_status 片选引脚的新状态，取值为0或1，即高电平或低电平 */ -void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status); +void ls1c_spi_set_cs(void *spi_base, unsigned char cs, int new_status); /* @@ -82,18 +126,20 @@ void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status); * 注意，在多任务的系统中，此函数需要互斥。 * 即保证在和某个从设备收发某个字节的过程中，不能被切换到其它任务同时与另外的在同一个SPI总线上的从设备通信 * 因为龙芯1c的每路SPI上可能接有不同的从设备，通信频率、模式等可能不同 - * @spi_info_p SPI接口 + * @spi_base 基地址 * @tx_ch 待发送的数据 * @ret 收到的数据 */ -unsigned char spi_txrx_byte(ls1c_spi_info_t *spi_info_p, unsigned char tx_ch); +unsigned char ls1c_spi_txrx_byte(void *spi_base, unsigned char tx_ch); /* * 打印指定SPI模块的所有寄存器的值 - * @spi_info_p SPI模块信息 + * @spi_base 基地址 */ -void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p); +void ls1c_spi_print_all_regs_info(void *spi_base); + + #endif diff --git a/bsp/ls1cdev/rtconfig.h b/bsp/ls1cdev/rtconfig.h index 168d3a7fda..ae208a485e 100644 --- a/bsp/ls1cdev/rtconfig.h +++ b/bsp/ls1cdev/rtconfig.h @@ -227,6 +227,11 @@ #define RTGUI_IMAGE_BMP // +#define RT_USING_SPI +#define RT_USING_SPI0 +#define RT_USING_SPI1 + + // #endif -- GitLab