mirror of
https://github.com/jhbruhn/eurorack.git
synced 2025-03-15 11:05:49 +00:00
92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
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#include "base_display.h"
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#include "spi_mode.h"
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#include <U8x8lib.h>
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#include <stm32f37x_conf.h>
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static const uint16_t kPinEnable = GPIO_Pin_2;
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static const uint16_t kPinReset = GPIO_Pin_0;
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static const uint16_t kPinDataCommand = GPIO_Pin_9;
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uint8_t u8x8_stm32_gpio_and_delay(U8X8_UNUSED u8x8_t* u8x8,
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U8X8_UNUSED uint8_t msg, U8X8_UNUSED uint8_t arg_int,
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U8X8_UNUSED void* arg_ptr)
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{
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return 1;
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}
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uint8_t u8x8_byte_4wire_stm32_spi(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int,
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void* arg_ptr)
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{
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uint8_t* data;
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switch (msg) {
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case U8X8_MSG_BYTE_SEND:
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data = (uint8_t*)arg_ptr;
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while (arg_int > 0) {
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while (!(SPI2->SR & SPI_SR_TXE)) {
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}
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SPI_SendData8(SPI2, (uint8_t)*data);
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arg_int--;
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data++;
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}
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break;
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case U8X8_MSG_BYTE_INIT:
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break;
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case U8X8_MSG_BYTE_SET_DC:
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if (arg_int)
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GPIO_WriteBit(GPIOB, kPinDataCommand, Bit_SET);
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else
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GPIO_WriteBit(GPIOB, kPinDataCommand, Bit_RESET);
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break;
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case U8X8_MSG_BYTE_START_TRANSFER:
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InitSPI(SPI_MODE_DISPLAY);
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GPIO_WriteBit(GPIOB, kPinEnable, Bit_RESET);
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break;
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case U8X8_MSG_BYTE_END_TRANSFER:
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GPIO_WriteBit(GPIOB, kPinEnable, Bit_SET);
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break;
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default:
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return 0;
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}
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return 1;
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}
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void BaseDisplay::Init()
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{
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// init SS/CS/RST GPIO
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
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GPIO_InitTypeDef gpio_init;
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gpio_init.GPIO_Mode = GPIO_Mode_OUT;
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gpio_init.GPIO_OType = GPIO_OType_PP;
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gpio_init.GPIO_Speed = GPIO_Speed_50MHz;
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gpio_init.GPIO_PuPd = GPIO_PuPd_NOPULL;
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gpio_init.GPIO_Pin = kPinEnable | kPinReset | kPinDataCommand;
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GPIO_Init(GPIOB, &gpio_init);
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GPIO_WriteBit(GPIOB, kPinEnable, Bit_SET);
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// init AF GPIO
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
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gpio_init.GPIO_Mode = GPIO_Mode_AF;
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gpio_init.GPIO_OType = GPIO_OType_PP;
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gpio_init.GPIO_Speed = GPIO_Speed_50MHz;
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gpio_init.GPIO_PuPd = GPIO_PuPd_NOPULL;
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gpio_init.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_14 | GPIO_Pin_15;
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GPIO_Init(GPIOB, &gpio_init);
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GPIO_PinAFConfig(GPIOB, GPIO_PinSource8, GPIO_AF_5);
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GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_5);
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GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_5);
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// init SPI
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
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SPI_I2S_DeInit(SPI2);
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// Initialize SPI
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InitSPI(SPI_MODE_DISPLAY);
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GPIO_WriteBit(GPIOB, kPinReset, Bit_RESET);
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asm("nop");
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GPIO_WriteBit(GPIOB, kPinReset, Bit_SET);
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InitGLib();
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}
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