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rt-thread-official/bsp/ls1cdev/libraries/ls1c_public.c

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将“龙芯1c库”中的GPIO相关接口移植到RT-Thread
2017-07-18 11:15:10 +08:00
// һЩ<D2BB><D0A9><EFBFBD>õġ<C3B5><C4A1><EFBFBD><EFBFBD>õĽӿ<C4BD>
/*
* <EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD>1
* @reg <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
* @bit <EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>1<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һbit
*/
void reg_set_one_bit(volatile unsigned int *reg, unsigned int bit)
{
unsigned int temp, mask;
mask = 1 << bit;
temp = *reg;
temp |= mask;
*reg = temp;
return ;
}
/*
* <EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @reg <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
* @bit <EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һbit
*/
void reg_clr_one_bit(volatile unsigned int *reg, unsigned int bit)
{
unsigned int temp, mask;
mask = 1 << bit;
temp = *reg;
temp &= ~mask;
*reg = temp;
return ;
}
/*
* <EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD>ֵ
* @reg <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
* @bit <EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ȡֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һbit
* @ret ָ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD>ֵ
*/
unsigned int reg_get_bit(volatile unsigned int *reg, unsigned int bit)
{
unsigned int temp;
temp = *reg;
temp = (temp >> bit) & 1;
return temp;
}
增加龙芯1c硬件I2C接口
2017-09-06 12:11:46 +08:00
/*
* <EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>8bit(һ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>)<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @data <EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @addr <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
*/
void reg_write_8(unsigned char data, volatile unsigned char *addr)
{
*addr = data;
}
/*
* <EFBFBD>ӼĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>8bit(һ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>)<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @addr <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
* @ret <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*/
unsigned char reg_read_8(volatile unsigned char *addr)
{
return (*addr);
}
将“龙芯1c库”中的GPIO相关接口移植到RT-Thread
2017-07-18 11:15:10 +08:00
/*
* <EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>дһ<EFBFBD><EFBFBD>32bit<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @data <EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @addr <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
*/
void reg_write_32(unsigned int data, volatile unsigned int *addr)
{
*addr = data;
}
/*
* <EFBFBD>ӼĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>32bit<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @addr <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
* @ret <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*/
unsigned int reg_read_32(volatile unsigned int *addr)
{
return (*addr);
}
将支持的中断个数从32个扩展到160个，至此可以支持所有中断
2017-07-20 17:05:59 +08:00
/**
* ffs - find first bit set
* @x: the word to search
*
* This is defined the same way as
* the libc and compiler builtin ffs routines, therefore
* differs in spirit from the above ffz (man ffs).
*/
int ls1c_ffs(int x)
{
int r = 1;
if (!x)
return 0;
if (!(x & 0xffff)) {
x >>= 16;
r += 16;
}
if (!(x & 0xff)) {
x >>= 8;
r += 8;
}
if (!(x & 0xf)) {
x >>= 4;
r += 4;
}
if (!(x & 3)) {
x >>= 2;
r += 2;
}
if (!(x & 1)) {
x >>= 1;
r += 1;
}
return r;
}
增加龙芯1c的硬件SPI相关接口
2017-10-23 17:10:48 +08:00
/*
* fls - find last (most-significant) bit set
* @x: the word to search
*
* This is defined the same way as ffs.
* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
*/
int ls1c_fls(int x)
{
int r = 32;
if (!x)
return 0;
if (!(x & 0xffff0000u))
{
x <<= 16;
r -= 16;
}
if (!(x & 0xff000000u))
{
x <<= 8;
r -= 8;
}
if (!(x & 0xf0000000u))
{
x <<= 4;
r -= 4;
}
if (!(x & 0xc0000000u))
{
x <<= 2;
r -= 2;
}
if (!(x & 0x80000000u))
{
x <<= 1;
r -= 1;
}
return r;
}