88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
#include "main.h"
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#include "display_gfx.h"
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#include "st7565.h"
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// #include "spi.h"
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#include "string.h"
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static uint8_t st7565_buffor[ST7565_BUFFER_SIZE];
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static void ST7565_SendCommand(st7565_handle_t *hdisp, uint8_t data)
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{
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HAL_GPIO_WritePin(hdisp->a0_port, hdisp->a0_pin, GPIO_PIN_RESET);
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HAL_SPI_Transmit(hdisp->hspi, &data, 1, HAL_MAX_DELAY);
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}
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static void ST7565_SendData(st7565_handle_t *hdisp, uint8_t *data, uint16_t size)
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{
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HAL_GPIO_WritePin(hdisp->a0_port, hdisp->a0_pin, GPIO_PIN_SET);
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HAL_SPI_Transmit(hdisp->hspi, data, size, HAL_MAX_DELAY);
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}
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void ST7565_Init(st7565_handle_t *hdisp, GFX_display_t *disp)
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{
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if (hdisp == NULL || hdisp->hspi == NULL || hdisp->a0_port == NULL || hdisp->cs_port == NULL || hdisp->rst_port == NULL)
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{
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Error_Handler();
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}
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disp->width = ST7565_WIDTH;
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disp->height = ST7565_HEIGHT;
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disp->buffor = st7565_buffor;
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// toggle RST low to reset; CS low so it'll listen to us
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HAL_GPIO_WritePin(hdisp->cs_port, hdisp->cs_pin, GPIO_PIN_RESET);
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HAL_GPIO_WritePin(hdisp->rst_port, hdisp->rst_pin, GPIO_PIN_RESET);
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HAL_Delay(500);
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HAL_GPIO_WritePin(hdisp->rst_port, hdisp->rst_pin, GPIO_PIN_SET);
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// LCD bias select
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ST7565_SendCommand(hdisp, CMD_SET_BIAS_7);
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// ADC select
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ST7565_SendCommand(hdisp, CMD_SET_ADC_REVERSE);
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// SHL select
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ST7565_SendCommand(hdisp, CMD_SET_COM_NORMAL);
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// Initial display line
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ST7565_SendCommand(hdisp, CMD_SET_DISP_START_LINE);
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// turn on voltage converter (VC=1, VR=0, VF=0)
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ST7565_SendCommand(hdisp, CMD_SET_POWER_CONTROL | 0x4);
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// wait for 50% rising
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HAL_Delay(50);
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// turn on voltage regulator (VC=1, VR=1, VF=0)
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ST7565_SendCommand(hdisp, CMD_SET_POWER_CONTROL | 0x6);
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// wait >=50ms
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HAL_Delay(50);
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// turn on voltage follower (VC=1, VR=1, VF=1)
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ST7565_SendCommand(hdisp, CMD_SET_POWER_CONTROL | 0x7);
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// wait
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HAL_Delay(10);
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// set lcd operating voltage (regulator resistor, ref voltage resistor)
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ST7565_SendCommand(hdisp, CMD_SET_RESISTOR_RATIO | 0x6);
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ST7565_SendCommand(hdisp, CMD_DISPLAY_ON);
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ST7565_SendCommand(hdisp, CMD_SET_ALLPTS_NORMAL);
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ST7565_SendCommand(hdisp, CMD_SET_VOLUME_FIRST);
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ST7565_SendCommand(hdisp, CMD_SET_VOLUME_SECOND | (0x00 & 0x3f));
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HAL_GPIO_WritePin(hdisp->cs_port, hdisp->cs_pin, GPIO_PIN_SET);
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}
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void ST7565_DisplayAll(st7565_handle_t *hdisp)
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{
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HAL_GPIO_WritePin(hdisp->cs_port, hdisp->cs_pin, GPIO_PIN_RESET);
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for (uint8_t p = 0; p < 8; p++)
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{
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ST7565_SendCommand(hdisp, CMD_SET_PAGE | p);
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ST7565_SendCommand(hdisp, CMD_SET_COLUMN_UPPER | 0);
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ST7565_SendCommand(hdisp, CMD_SET_COLUMN_LOWER | 0);
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ST7565_SendData(hdisp, &st7565_buffor[128 * p], 128);
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}
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HAL_GPIO_WritePin(hdisp->cs_port, hdisp->cs_pin, GPIO_PIN_SET);
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}
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