arti/dht_test
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Add 7 segment display

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This commit is contained in:
Arti Zirk 2021-08-22 22:31:36 +03:00
parent 3b0739f81b
commit 9c28d33e41
2 changed files with 105 additions and 4 deletions
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1
.editorconfig
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@ -6,3 +6,4 @@ end_of_line = lf
insert_final_newline = true
indent_style = tab
indent_size = 4

108
main.c
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@ -31,6 +31,51 @@
#define DHT_PORT GPIOB
#define DHT_PIN GPIO0
#define SEGMENT_PORT GPIOA
#define SEGMENT_A GPIO7
#define SEGMENT_B GPIO5
#define SEGMENT_C GPIO2
#define SEGMENT_D GPIO0
#define SEGMENT_E GPIO1
#define SEGMENT_F GPIO3
#define SEGMENT_G GPIO6
#define SEGMENT_DOT GPIO4
#define SEGMENT_ALL GPIO0 | GPIO1 | GPIO2 | GPIO3 | GPIO4 | GPIO5 | GPIO6 | GPIO7 | GPIO4
#define COMMON_PORT GPIOB
#define COMMON_ALL GPIO15 | GPIO14 | GPIO13 | GPIO12 | GPIO11
#define COMMON_1 GPIO15
#define COMMON_2 GPIO14
#define COMMON_3 GPIO13
#define COMMON_4 GPIO12
#define COMMON_L GPIO11
const uint16_t segment_numbers[] = {
SEGMENT_A | SEGMENT_B | SEGMENT_C | SEGMENT_D | SEGMENT_E | SEGMENT_F, // 0
SEGMENT_B | SEGMENT_C, // 1
SEGMENT_A | SEGMENT_B | SEGMENT_D | SEGMENT_E | SEGMENT_G, // 2
SEGMENT_A | SEGMENT_B | SEGMENT_C | SEGMENT_D | SEGMENT_G, // 3
SEGMENT_B | SEGMENT_C | SEGMENT_F | SEGMENT_G, // 4
SEGMENT_A | SEGMENT_C | SEGMENT_D | SEGMENT_F | SEGMENT_G, // 5
SEGMENT_A | SEGMENT_C | SEGMENT_D | SEGMENT_E | SEGMENT_F | SEGMENT_G, // 6
SEGMENT_A | SEGMENT_B | SEGMENT_C, // 7
SEGMENT_A | SEGMENT_B | SEGMENT_C | SEGMENT_D | SEGMENT_E | SEGMENT_F | SEGMENT_G, // 8
SEGMENT_A | SEGMENT_B | SEGMENT_C | SEGMENT_D | SEGMENT_F | SEGMENT_G, // 9
SEGMENT_A | SEGMENT_B | SEGMENT_C | SEGMENT_E | SEGMENT_F | SEGMENT_G, // A 10
SEGMENT_C | SEGMENT_D | SEGMENT_E | SEGMENT_F | SEGMENT_G, // B 11
SEGMENT_A | SEGMENT_D | SEGMENT_E | SEGMENT_F, // C 12
SEGMENT_B | SEGMENT_C | SEGMENT_D | SEGMENT_E | SEGMENT_G, // D 13
SEGMENT_A | SEGMENT_D | SEGMENT_E | SEGMENT_F | SEGMENT_G, // E 14
SEGMENT_A | SEGMENT_E | SEGMENT_F | SEGMENT_G, // F 15
SEGMENT_B | SEGMENT_C | SEGMENT_E | SEGMENT_F | SEGMENT_G, // H 16
SEGMENT_G // - 17
};
const uint16_t common_numbers[] = { COMMON_1, COMMON_2, COMMON_3, COMMON_4 };
volatile int segment_values[] = {17, 17, 17, 17};
volatile int common_counter = 0;
enum DHT11_STATE {
DHT11_STOP, // Stop statemachine
DHT11_START, // We drive DATA Low for minimum 18ms and then drive it HIGH and start waiting for response
@ -62,6 +107,7 @@ static void gpio_setup(void)
/* Manually: */
// RCC_APB2ENR |= RCC_APB2ENR_IOPCEN;
/* Using API functions: */
rcc_periph_clock_enable(RCC_GPIOA);
rcc_periph_clock_enable(RCC_GPIOB);
/* Set GPIO5 (in GPIO port A) to 'output push-pull'. */
@ -75,14 +121,35 @@ static void gpio_setup(void)
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO1);
// A random DEBUG pin we can toggle and measure with logic
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO2);
// 7segments
gpio_set_mode(SEGMENT_PORT, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, SEGMENT_ALL);
// commons
gpio_set_mode(COMMON_PORT, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, COMMON_ALL);
}
// Onetime config of timer things that stay the same
static void tim_setup(void)
{
nvic_enable_irq(NVIC_TIM3_IRQ);
nvic_set_priority(NVIC_TIM3_IRQ, 1); // interrupts will not work without it???
// 7 segment driver timer
nvic_enable_irq(NVIC_TIM2_IRQ);
nvic_set_priority(NVIC_TIM2_IRQ, 2);
rcc_periph_clock_enable(RCC_TIM2);
rcc_periph_reset_pulse(RST_TIM2);
timer_set_mode(TIM2, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP);
timer_set_prescaler(TIM2, (rcc_apb1_frequency*2) / 1000000 - 1); // set timer tickrate to 1mhz
timer_set_period(TIM2, 3000); // 1 ms
timer_enable_irq(TIM2, TIM_DIER_UIE);
// start displaying 7 segment numbers
timer_enable_counter(TIM2);
// DHT11 Reading timer
nvic_enable_irq(NVIC_TIM3_IRQ);
nvic_set_priority(NVIC_TIM3_IRQ, 1);
rcc_periph_clock_enable(RCC_TIM3);
rcc_periph_reset_pulse(RST_TIM3);
@ -93,6 +160,26 @@ static void tim_setup(void)
timer_enable_irq(TIM3, TIM_DIER_UIE); // overflow
timer_enable_irq(TIM3, TIM_DIER_CC3IE); // triggered when DHT drives DATA pin
// timer is enabled in dht_start()
}
static void show_segment_value(int common, int value, bool decimal) {
gpio_clear(COMMON_PORT, COMMON_ALL);
gpio_set(SEGMENT_PORT, SEGMENT_ALL);
gpio_clear(SEGMENT_PORT, segment_numbers[value] | (decimal ? SEGMENT_DOT : 0));
gpio_set(COMMON_PORT, common_numbers[common]);
}
void tim2_isr(void) {
if (timer_get_flag(TIM2, TIM_SR_UIF)) {
timer_clear_flag(TIM2, TIM_SR_UIF);
show_segment_value(common_counter, segment_values[common_counter],
common_counter == 1 ? true : false);
common_counter++;
if (common_counter > 3){
common_counter = 0;
}
}
}
void tim3_isr(void)
@ -227,6 +314,17 @@ static void dht_parse_data(void) {
if (checksum == data[4]) {
SEGGER_RTT_printf(0, "Humidity: %d.%d%%; Temperature: %d.%dC\n",
data[0], data[1], data[2], data[3]);
if (segment_values[3] == 0xC) {
segment_values[3] = 16; // now showing humidity
segment_values[0] = (data[0] / 10) % 10;
segment_values[1] = data[0] % 10;
segment_values[2] = data[1] % 10;
} else {
segment_values[3] = 0xC; // now showing temperature
segment_values[0] = (data[2] / 10) % 10;
segment_values[1] = data[2] % 10;
segment_values[2] = data[3] % 10;
}
} else {
SEGGER_RTT_printf(0, "Checksum did not match, %x != %x\n", checksum, data[4]);
}
@ -256,10 +354,12 @@ int main(void)
/* Blink the LED (PA5) on the board. */
while (1) {
/* Using API function gpio_toggle(): */
gpio_toggle(GPIOB, GPIO1); /* LED on/off */
//gpio_toggle(GPIOB, GPIO1); /* LED on/off */
SEGGER_RTT_printf(0, "Poll: %d, seg: %d\n", i, i & 0xf);
//show_segment_value(i & 3, 16, false);
i++;
SEGGER_RTT_printf(0, "Poll: %d\n", i);
delay(10000000);
//delay(1000000);
dht_start();
wait = true;
while (wait) {