//初始化高位地址线
void init_gpio(void)
{
/* set McAsp0 as GPIO*/
//A12 - AMUTE0
*(int *)PFU_MCASP0 |= 0x02000000;
*(int *)DIR_MCASP0 |= 0x02000000;
*(int *)OUT_MCASP0 &= ~0x02000000;
/* set McAsp1 as GPIO*/
// A13-AMUTE1 | A14-AHCLKX1 | A15-ACLKX1 | A16-ACLKR1
*(int *)PFU_MCASP1 |= 0x4e000000;
*(int *)DIR_MCASP1 |= 0x4e000000;
*(int *)OUT_MCASP1 &= ~0x4e000000;
}
//设置高位地址
void setGPIOHiAddr(int addr)
{
//A12-AMUTE0
//A13-AMUTE1
//A14-AHCLKX1
//A15-ACLKX1
//A16-ACLKR1
int out1 = *(int *)OUT_MCASP0;
int out2 = *(int *)OUT_MCASP1;
out1 &= ~0x02000000;
out1 |= (addr << 13) & 0x02000000;
*(int *)OUT_MCASP0 = out1;
out2 &= ~0x4e000000;
out2 |= (addr << 13) & 0x20000000;
out2 |= (addr << 13) & 0x08000000;
out2 |= (addr << 11) & 0x04000000;
out2 |= (addr << 12) & 0x02000000;
*(int *)OUT_MCASP1 = out2;
}
//擦除flash
void eeprom_erase(void)
{
setGPIOHiAddr((int)FLASH_5555);
*(unsigned volatile char *)(FLASH_5555) = 0xaa;
setGPIOHiAddr((int)FLASH_2AAA);
*(unsigned volatile char *)(FLASH_2AAA) = 0x55;
setGPIOHiAddr((int)FLASH_5555);
*(unsigned volatile char *)(FLASH_5555) = 0x80;
setGPIOHiAddr((int)FLASH_5555);
*(unsigned volatile char *)(FLASH_5555) = 0xaa;
setGPIOHiAddr((int)FLASH_2AAA);
*(unsigned volatile char *)(FLASH_2AAA) = 0x55;
setGPIOHiAddr((int)FLASH_5555);
*(unsigned volatile char *)(FLASH_5555) = 0x10;
}
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