提交 a695187d 编写于 作者: C chuck todd 提交者: GitHub

Correct 10bit Device address handling.

The existing code did not follow protocol with 10bit addressed devices.  Per _Philps/NXP Semiconductors UM10204 I2C-bus specification and user manual Rev. 6 4April2014_ pg.15 3.1.11 10-bit addressing:
~The first seven bits of the first byte are the combination of 1111 0xx of which the last two bits (xx) are the two Most-Significant Bits (MSB) of the 10-bit address; the eighth bit of the first byte is the R/!W! bit the determines the direction of the message~
上级 0c038b40
......@@ -176,10 +176,13 @@ i2c_err_t i2cWrite(i2c_t * i2c, uint16_t address, bool addr_10bit, uint8_t * dat
//CMD WRITE(ADDRESS + DATA)
if(!index) {
i2c->dev->fifo_data.data = address & 0xFF;
dataSend--;
if(addr_10bit) {
i2c->dev->fifo_data.data = (address >> 8) & 0xFF;
if(addr_10bit){// address is leftshifted with Read/Write bit set
i2c->dev->fifo_data.data = (((address >> 8) & 0x6) | 0xF0); // send a9:a8 plus 1111 0xxW mask
i2c->dev->fifo_data.data = ((address >> 1) & 0xFF); // send a7:a0, remove W bit (7bit address style)
dataSend -= 2;
}
else { // 7bit address
i2c->dev->fifo_data.data = address & 0xFF;
dataSend--;
}
}
......@@ -272,10 +275,14 @@ i2c_err_t i2cRead(i2c_t * i2c, uint16_t address, bool addr_10bit, uint8_t * data
i2cSetCmd(i2c, 0, I2C_CMD_RSTART, 0, false, false, false);
//CMD WRITE ADDRESS
i2c->dev->fifo_data.val = address & 0xFF;
if(addr_10bit) {
i2c->dev->fifo_data.val = (address >> 8) & 0xFF;
if(addr_10bit){// address is leftshifted with Read/Write bit set
i2c->dev->fifo_data.data = (((address >> 8) & 0x6) | 0xF1); // send a9:a8 plus 1111 0xxR mask
i2c->dev->fifo_data.data = ((address >> 1) & 0xFF); // send a7:a0, remove R bit (7bit address style)
}
else { // 7bit address
i2c->dev->fifo_data.data = address & 0xFF;
}
i2cSetCmd(i2c, 1, I2C_CMD_WRITE, addrLen, false, false, true);
while(len) {
......
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