it can be worked in NORMAL or SIMPLE calling convention
and in all the optimize level(none, low, medium, high)

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1691 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1690 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1689 bbd45198-f89e-11dd-88c7-29a3b14d5316

void rt_hw_context_switch(rt_uint32_t from, rt_uint32_t to);

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1688 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1687 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1686 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1685 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1684 bbd45198-f89e-11dd-88c7-29a3b14d5316

Warning[w6]: Type conflict for external/entry "list", in module symbol against external/entry in module cmd; function return types are different; different basic types 


git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1683 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1682 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Support Keil MDK development environment
2. Modify EMAC driver according to the changes of lwIP API in reversion 1668 and 1669

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1681 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Add the missing file, "mma7455l.h"
2. Modify Ethernet DEMO according to the changes of lwIP API in reversion 1668 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1680 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1679 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Change the usage of the second parameter of Read and Write functions in IIC driver 
   - to "Slave address" from (seldom used) "Offset" 
2. Add a timer for IIC driver to prevent from forever waiting
3. Add digital (IIC) interface support for accelerometer driver (Freescale MMA7455L)

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1678 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1677 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1676 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1675 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1674 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1673 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1672 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1671 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1670 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1669 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1668 bbd45198-f89e-11dd-88c7-29a3b14d5316

based on LS1G DEMO BOARD V1.1

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1667 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1666 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1665 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1664 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1663 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1662 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1661 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1660 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1659 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1656 bbd45198-f89e-11dd-88c7-29a3b14d5316

Modify IIC and USART drivers to avoid compiling error.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1655 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Add interrupt context check function (context_gcc.S)
2. Add lock (semaphore) for IIC, USART and Ethernet drivers to prevent simultaneously access
3. Add multiple channels support for scan mode of ADC driver
4. Modify miscellaneous drivers according to ADC driver changes
5. Add SWO output enable function (board.c)
6. Disable all interrupts in GPIO interrupt handler (hdl_interrupt.c)
7. Add two Ethernet utility functions (drv_ethernet.c)
8. Add accelerometer driver (analog output)
9. Add accelerometer demo (draft, application.c)

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1654 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1653 bbd45198-f89e-11dd-88c7-29a3b14d5316

re-implemented ethernetif and power-on flow of lwip1.4, note:  ethnet driver and init invokings also need to be modified.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1652 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1651 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1650 bbd45198-f89e-11dd-88c7-29a3b14d5316