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ADC with DMA works!

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This commit is contained in:
eddyem 2019-05-19 14:12:00 +03:00
parent 96c7e0d77c
commit 0cd287d544
4 changed files with 26 additions and 35 deletions
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19
F1-nolib/F1_testbrd/Makefile
View File

@ -4,18 +4,18 @@ BOOTSPEED ?= 115200
# MCU FAMILY
FAMILY ?= F1
# MCU code
MCU ?= F103xB
MCU ?= F103x8
# density (stm32f10x.h, lines 70-84)
DENSITY ?= MD
# change this linking script depending on particular MCU model,
LDSCRIPT ?= stm32f103xB.ld
LDSCRIPT ?= stm32f103x8.ld
# debug
DEFS = -DEBUG
INDEPENDENT_HEADERS=
FP_FLAGS ?= -msoft-float
ASM_FLAGS ?= -mthumb -mcpu=cortex-m3
FP_FLAGS ?= -msoft-float -mfloat-abi=soft
ASM_FLAGS ?= -mthumb -mcpu=cortex-m3 -mfix-cortex-m3-ldrd
ARCH_FLAGS = $(ASM_FLAGS) $(FP_FLAGS)
###############################################################################
@ -59,17 +59,18 @@ LIB_DIR := $(INC_DIR)/ld
# C flags
CFLAGS += -O2 -g -D__thumb2__=1 -MD
CFLAGS += -Wall -Werror -Wextra -Wshadow
CFLAGS += -fno-common -ffunction-sections -fdata-sections
CFLAGS += -fno-common -ffunction-sections -fdata-sections -fno-stack-protector
CFLAGS += $(ARCH_FLAGS)
###############################################################################
# Linker flags
LDFLAGS += -nostartfiles --static
LDFLAGS += -nostartfiles --static -nostdlibs
LDFLAGS += -L$(LIB_DIR) -L$(TOOLCHLIB)
LDFLAGS += -T$(LDSCRIPT)
###############################################################################
# Used libraries
LDLIBS += -lc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
LDLIBS += $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
DEFS += -DSTM32$(FAMILY) -DSTM32$(MCU) -DSTM32F10X_$(DENSITY)
@ -93,11 +94,11 @@ $(OBJDIR):
mkdir $(OBJDIR)
$(STARTUP): $(INC_DIR)/startup/vector.c
$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
$(OBJDIR)/%.o: %.c
@echo " CC $<"
$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
$(BIN): $(ELF)
@echo " OBJCOPY $(BIN)"

8
F1-nolib/F1_testbrd/adc.c
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@ -56,17 +56,15 @@ int32_t getMCUtemp(){
// Temp = (V25 - Vsense)/Avg_Slope + 25
// V_25 = 1.45V, Slope = 4.3e-3
int32_t Vsense = getVdd() * getADCval(1);
Vsense /= 4096;
int32_t temperature = 145 - Vsense;
temperature *= 233;
temperature /= 10; // convert from *100 to *10
int32_t temperature = 593920 - Vsense; // 593920 == 145*4096
temperature /= 172; // == /(4096*10*4.3e-3), 10 - to convert from *100 to *10
temperature += 250;
return(temperature);
}
// return Vdd * 100 (V)
uint32_t getVdd(){
uint32_t vdd = ((uint32_t) *VREFINT_CAL_ADDR) * (uint32_t)300; // 3.0V
uint32_t vdd = 120 * 4096; // 1.2V
vdd /= getADCval(2);
return vdd;
}

25
F1-nolib/F1_testbrd/hardware.c
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@ -41,31 +41,32 @@ static inline void gpio_setup(){
static inline void adc_setup(){
GPIOB->CRL |= CRL(0, CNF_ANALOG|MODE_INPUT);
uint16_t ctr = 0; // 0xfff0 - more than 1.3ms
uint32_t ctr = 0;
// Enable clocking
RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;
RCC->CFGR &= ~(RCC_CFGR_ADCPRE);
RCC->CFGR |= RCC_CFGR_ADCPRE_1;
RCC->CFGR |= RCC_CFGR_ADCPRE_DIV8; // ADC clock = RCC / 8
// sampling time - 239.5 cycles for channels 8, 16 and 17
ADC1->SMPR2 = ADC_SMPR2_SMP8;
ADC1->SMPR1 = ADC_SMPR1_SMP16 | ADC_SMPR1_SMP17;
// wake up ADC
ADC1->CR2 |= ADC_CR2_ADON;
// we have three conversions in group -> ADC1->SQR1[L] = 2, order: 8->16->17
ADC1->SQR3 = 8 | (16<<5)| (17<<10);
ADC1->SQR3 = 8 | (16<<5) | (17<<10);
ADC1->SQR1 = ADC_SQR1_L_1;
// calibration
ADC1->CR2 |= ADC_CR2_CAL;
while((ADC1->CR2 & ADC_CR2_CAL) && ++ctr < 0xfff0);
ADC1->CR1 |= ADC_CR1_SCAN; // scan mode
// DMA configuration
RCC->AHBENR |= RCC_AHBENR_DMA1EN;
DMA1_Channel1->CPAR = (uint32_t) (&(ADC1->DR));
DMA1_Channel1->CMAR = (uint32_t)(ADC_array);
DMA1_Channel1->CNDTR = NUMBER_OF_ADC_CHANNELS * 9;
DMA1_Channel1->CCR |= DMA_CCR_MINC | DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_0 | DMA_CCR_CIRC;
DMA1_Channel1->CCR |= DMA_CCR_EN;
// continuous mode & DMA; enable vref & Tsens; start
ADC1->CR2 |= ADC_CR2_CONT | ADC_CR2_DMA | ADC_CR2_TSVREFE | ADC_CR2_SWSTART;
DMA1_Channel1->CCR |= DMA_CCR_MINC | DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_0
| DMA_CCR_CIRC | DMA_CCR_PL | DMA_CCR_EN;
// continuous mode & DMA; enable vref & Tsens; wake up ADC
ADC1->CR2 |= ADC_CR2_DMA | ADC_CR2_TSVREFE | ADC_CR2_CONT | ADC_CR2_ADON;
// calibration
ADC1->CR2 |= ADC_CR2_RSTCAL;
while((ADC1->CR2 & ADC_CR2_RSTCAL) && ++ctr < 0xfffff);
ADC1->CR2 |= ADC_CR2_CAL;
ctr = 0; while((ADC1->CR2 & ADC_CR2_CAL) && ++ctr < 0xfffff);
// turn ON ADC
ADC1->CR2 |= ADC_CR2_ADON;
}

9
F1-nolib/F1_testbrd/main.c
View File

@ -69,20 +69,11 @@ char *parse_cmd(char *buf){
case '1':
pin_clear(GPIOA, 1<<4);
break;
case 'a':
printu(getADCval(0)); newline();
printu(getADCval(1)); newline();
printu(getADCval(2)); newline();
break;
case 'b':
btns[5] = GET_BTN0() + '0';
btns[13] = GET_BTN1() + '0';
return btns;
break;
case 'c':
printu((uint32_t) *VREFINT_CAL_ADDR);
newline();
break;
case 'p':
pin_toggle(USBPU_port, USBPU_pin);
SEND("USB pullup is ");