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86 lines
2.4 KiB
86 lines
2.4 KiB
#include "stm8s.h"
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#include <stdio.h>
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#include <stdbool.h>
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#include "bootstrap.h"
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void main(void)
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{
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SimpleInit();
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//GPIOC->DDR |= GPIO_PIN_4; // out
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//GPIOC->CR1 &= ~GPIO_PIN_4; // open drain
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//GPIOC->CR2 |= GPIO_PIN_4; // fast
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// Rows
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GPIO_Init(GPIOC, GPIO_PIN_3, GPIO_MODE_OUT_OD_HIZ_FAST);
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GPIO_Init(GPIOC, GPIO_PIN_4, GPIO_MODE_OUT_OD_HIZ_FAST);
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GPIO_Init(GPIOC, GPIO_PIN_5, GPIO_MODE_OUT_OD_HIZ_FAST);
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GPIO_Init(GPIOC, GPIO_PIN_6, GPIO_MODE_OUT_OD_HIZ_FAST);
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// Columns (feedback)
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GPIO_Init(GPIOD, GPIO_PIN_1, GPIO_MODE_IN_PU_NO_IT);
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GPIO_Init(GPIOD, GPIO_PIN_2, GPIO_MODE_IN_PU_NO_IT);
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GPIO_Init(GPIOD, GPIO_PIN_3, GPIO_MODE_IN_PU_NO_IT);
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GPIO_Init(GPIOD, GPIO_PIN_4, GPIO_MODE_IN_PU_NO_IT);
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bool matrix[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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uint16_t counter[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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const char *digits = "123A456B789C*0#D";
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#define DEBO 8
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while (1) {
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int b = 0;
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GPIO_WriteLow(GPIOC, GPIO_PIN_3);
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Delay(1);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_1);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_2);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_3);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_4);
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GPIO_WriteHigh(GPIOC, GPIO_PIN_3);
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GPIO_WriteLow(GPIOC, GPIO_PIN_4);
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Delay(1);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_1);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_2);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_3);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_4);
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GPIO_WriteHigh(GPIOC, GPIO_PIN_4);
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GPIO_WriteLow(GPIOC, GPIO_PIN_5);
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Delay(1);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_1);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_2);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_3);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_4);
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GPIO_WriteHigh(GPIOC, GPIO_PIN_5);
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GPIO_WriteLow(GPIOC, GPIO_PIN_6);
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Delay(1);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_1);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_2);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_3);
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matrix[b++] = GPIO_ReadInputPin(GPIOD, GPIO_PIN_4);
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GPIO_WriteHigh(GPIOC, GPIO_PIN_6);
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for (int i = 0; i < 16; i++) {
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if (matrix[i] == 0) {
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// pushed
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if (counter[i] < DEBO) {
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counter[i]++;
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if (counter[i] == DEBO) {
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GPIO_WriteLow(GPIOB, GPIO_PIN_5); // LED on
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putchar(digits[i]);
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}
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}
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} else {
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counter[i] = 0;
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}
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}
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Delay(5);
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GPIO_WriteHigh(GPIOB, GPIO_PIN_5); // LED off
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}
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}
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