93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
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#pragma once
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#include <stm32f4xx_hal.h>
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#include <string.h>
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// The command byte to put on the front of each page line
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#define SSD1312_PAGE_PREFIX 0x40 // Co = 0, D/C = 1
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static I2C_HandleTypeDef i2cHandle;
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static GFXINLINE void init_board(GDisplay *g)
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{
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(void) g;
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// GPIO
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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__HAL_RCC_GPIOB_CLK_ENABLE();
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// I2C SCL
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GPIO_InitStruct.Pin = GPIO_PIN_8;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
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GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
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HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
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// I2C SDA
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GPIO_InitStruct.Pin = GPIO_PIN_9;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
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GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
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HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
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}
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// I2C1
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{
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__HAL_RCC_I2C1_CLK_ENABLE();
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i2cHandle.Instance = I2C1;
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i2cHandle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
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i2cHandle.Init.ClockSpeed = 400000;
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i2cHandle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
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i2cHandle.Init.DutyCycle = I2C_DUTYCYCLE_2;
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i2cHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
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i2cHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
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if (HAL_I2C_Init(&i2cHandle) != HAL_OK)
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gfxHalt("I2C HAL init error");
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}
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}
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static GFXINLINE void post_init_board(GDisplay *g)
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{
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(void) g;
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}
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static GFXINLINE void setpin_reset(GDisplay *g, gBool state)
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{
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(void) g;
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(void) state;
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}
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static GFXINLINE void acquire_bus(GDisplay *g)
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{
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(void) g;
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}
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static GFXINLINE void release_bus(GDisplay *g)
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{
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(void) g;
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}
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static GFXINLINE void write_cmd(GDisplay *g, gU8 *data, gU16 length)
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{
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(void) g;
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gU8 buf[4]; // length is always <= 3
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buf[0] = 0x00;
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memcpy(buf+1, data, length);
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HAL_I2C_Master_Transmit(&i2cHandle, (0x3c << 1), buf, length+1, 10000);
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}
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static GFXINLINE void write_data(GDisplay *g, gU8 *data, gU16 length)
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{
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(void) g;
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HAL_I2C_Master_Transmit(&i2cHandle, (0x3c << 1), data, length, 10000);
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}
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