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fixed i2c (internal pullup + right scan method)

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This commit is contained in:
Edward Emelianov
2023-01-10 23:45:27 +03:00
parent f88e9ec4df
commit ed5a19f8bb
4 changed files with 17 additions and 16 deletions
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11
G0:G070/i2c/i2c.c
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@@ -59,6 +59,8 @@ void i2c_setup(I2C_SPEED speed){
6 << (6 * 4) | 6 << (7 * 4);
GPIOB->MODER = (GPIOB->MODER & ~(GPIO_MODER_MODE6 | GPIO_MODER_MODE7)) |
GPIO_MODER_MODER6_AF | GPIO_MODER_MODER7_AF;
GPIOB->PUPDR = (GPIOB->PUPDR & !(GPIO_PUPDR_PUPD6 | GPIO_PUPDR_PUPD7)) |
GPIO_PUPDR6_PU | GPIO_PUPDR7_PU; // pullup
GPIOB->OTYPER |= GPIO_OTYPER_OT6 | GPIO_OTYPER_OT7; // both open-drain outputs
// I2C (default timing from PCLK - 64MHz)
RCC->APBENR1 |= RCC_APBENR1_I2C1EN; // clocking
@@ -142,7 +144,7 @@ static uint8_t write_i2cs(uint8_t addr, uint8_t *data, uint8_t nbytes, uint8_t s
return 0;
}
if(Tms - cntr > I2C_TIMEOUT){
USND("Timeout\n");
//USND("Timeout\n");
return 0;
}
}
@@ -198,11 +200,11 @@ static uint8_t read_i2cb(uint8_t addr, uint8_t *data, uint8_t nbytes, uint8_t bu
IWDG->KR = IWDG_REFRESH;
if(I2C1->ISR & I2C_ISR_NACKF){
I2C1->ICR |= I2C_ICR_NACKCF;
USND("NAK\n");
//USND("NAK\n");
return 0;
}
if(Tms - cntr > I2C_TIMEOUT){
USND("Timeout\n");
//USND("Timeout\n");
return 0;
}
}
@@ -261,7 +263,8 @@ int i2c_scan_next_addr(uint8_t *addr){
/*while(!u3txrdy);
USND("Addr: "); USND(uhex2str(i2caddr)); USND("\n");
usart3_sendbuf();*/
if(!read_i2c_reg((i2caddr++)<<1, 0, NULL, 0)) return 0;
uint8_t byte;
if(!read_i2c((i2caddr++)<<1, &byte, 1)) return 0;
return 1;
}