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Implemented adc_init

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T-moe
2016-01-31 20:38:02 +01:00
parent c7a07a34dc
commit 878b83f771
1 changed files with 54 additions and 5 deletions
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59
src/io.s
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@@ -1,7 +1,4 @@
//---------Local variables ---------------------- //--------Local definitions ---------------------
.data
/* /*
typedef struct pin_s { typedef struct pin_s {
@@ -108,8 +105,60 @@ end_pin_get:
//No Parameters, No Return value //No Parameters, No Return value
adc_init: adc_init:
.set GPIO_MODER_MODER0, 3
.set GPIO_PUPDR_PUPDR0, 3
.set GPIO_Mode_AN, 3
.set RCC_APB2Periph_ADC, 0x100
.set ADC_Resolution_10b, 0x01000000
.set ADC_CR2_ADON, 1
.set OFFSET_CR1, 0x4
.set OFFSET_SQR1, 0x2c
.set OFFSET_CR2, 0x8
LDR r1, =0x40020400 //r1 = GPIOB
//GPIOB->MODER &= ~GPIO_MODER_MODER0;
LDR r3, [r1, #OFFSET_MODR] //r3 = GPIOB->MODR
MOV r2, #GPIO_MODER_MODER0
BIC r3, r3, r2 //r3 &= ~GPIO_MODER_MODER0
//GPIOB->MODER |= GPIO_Mode_AN;
MOV r2, #GPIO_Mode_AN
ORR r3, r3, r2 //r3 |= GPIO_Mode_AN
STR r3, [r1, #OFFSET_MODR] //GPIOB->MODR = r3
//GPIOB->PUPDR &= ~GPIO_PUPDR_PUPDR0;
LDR r3, [r1, #OFFSET_PUPDR] //r3 = GPIOB->PUPDR
MOV r2, #GPIO_PUPDR_PUPDR0
BIC r3, r3, r2 //r3 &= ~GPIO_PUPDR_PUPDR0
//GPIOB->PUPDR |= GPIO_PuPd_UP;
MOV r2, #GPIO_PuPd_UP
ORR r3, r3, r2 //r3 |= GPIO_PuPd_UP
STR r3, [r1, #OFFSET_PUPDR] //GPIOB->PUPDR = r3
//RCC->APB2ENR |= RCC_APB2Periph_ADC;
LDR r1, =0x40023844 //RCC base: 0x40023800, APB2ENR offset: 0x44
LDR r3, [r1] //r3 = RCC->APB2ENR
LDR r2, =#RCC_APB2Periph_ADC
ORR r3, r3, r2 //r3 |= RCC_APB2Periph_ADC
STR r3, [r1]
//ADC1->CR1 = ADC_Resolution_10b;
LDR r1, =0x40012000 //Adc base adress
LDR r2, =#ADC_Resolution_10b
STR r2, [r1, #OFFSET_CR1]
//ADC1->SQR1 = 0;
MOV r2, #0
STR r2, [r1, #OFFSET_SQR1]
//ADC1->CR2 = ADC_CR2_ADON;
MOV r2, #ADC_CR2_ADON
STR r2, [r1, #OFFSET_CR2]
//TODO: Implement
end_adc_init: end_adc_init: