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add support for GPIO remapping (copied from stm32f_gpio.c)

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This commit is contained in:
dongie 2014-05-01 12:10:33 +09:00
parent 8a5f424421
commit 25ec04763b
2 changed files with 39 additions and 0 deletions
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38
src/drv_gpio.c
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@ -40,3 +40,41 @@ void gpioExtiLineConfig(uint8_t portsrc, uint8_t pinsrc)
AFIO->EXTICR[pinsrc >> 0x02] &= ~tmp;
AFIO->EXTICR[pinsrc >> 0x02] |= (((uint32_t)portsrc) << (0x04 * (pinsrc & (uint8_t)0x03)));
}
#define LSB_MASK ((uint16_t)0xFFFF)
#define DBGAFR_POSITION_MASK ((uint32_t)0x000F0000)
#define DBGAFR_SWJCFG_MASK ((uint32_t)0xF0FFFFFF)
#define DBGAFR_LOCATION_MASK ((uint32_t)0x00200000)
#define DBGAFR_NUMBITS_MASK ((uint32_t)0x00100000)
void gpioPinRemapConfig(uint32_t remap, bool enable)
{
uint32_t tmp = 0x00, tmp1 = 0x00, tmpreg = 0x00, tmpmask = 0x00;
if ((remap & 0x80000000) == 0x80000000)
tmpreg = AFIO->MAPR2;
else
tmpreg = AFIO->MAPR;
tmpmask = (remap & DBGAFR_POSITION_MASK) >> 0x10;
tmp = remap & LSB_MASK;
if ((remap & (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) == (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) {
tmpreg &= DBGAFR_SWJCFG_MASK;
AFIO->MAPR &= DBGAFR_SWJCFG_MASK;
} else if ((remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK) {
tmp1 = ((uint32_t)0x03) << tmpmask;
tmpreg &= ~tmp1;
tmpreg |= ~DBGAFR_SWJCFG_MASK;
} else {
tmpreg &= ~(tmp << ((remap >> 0x15) * 0x10));
tmpreg |= ~DBGAFR_SWJCFG_MASK;
}
if (enable)
tmpreg |= (tmp << ((remap >> 0x15)*0x10));
if ((remap & 0x80000000) == 0x80000000)
AFIO->MAPR2 = tmpreg;
else
AFIO->MAPR = tmpreg;
}

1
src/drv_gpio.h
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@ -54,3 +54,4 @@ typedef struct
void gpioInit(GPIO_TypeDef *gpio, gpio_config_t *config);
void gpioExtiLineConfig(uint8_t portsrc, uint8_t pinsrc);
void gpioPinRemapConfig(uint32_t remap, bool enable);