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61 lines
1.5 KiB
61 lines
1.5 KiB
#include <u8g2.h> |
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#include <util/delay.h> |
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#include <u8x8_avr.h> |
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#define P_CPU_NS (1000000000UL / F_CPU) |
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u8g2_t u8g2; |
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uint8_t u8x8_gpio_and_delay(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) |
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{ |
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// Re-use library for delays |
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if(u8x8_avr_delay(u8x8, msg, arg_int, arg_ptr)) |
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return 1; |
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switch(msg){ |
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case U8X8_MSG_GPIO_AND_DELAY_INIT: // called once during init phase of u8g2/u8x8 |
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DDRB |= (1<<0); // CS |
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DDRB |= (1<<4); // DC |
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DDRA |= (1<<7); // RESET |
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break; // can be used to setup pins |
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case U8X8_MSG_GPIO_CS: // CS (chip select) pin: Output level in arg_int |
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if(arg_int) |
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PORTB |= (1<<0); |
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else |
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PORTB &= ~(1<<0); |
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break; |
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case U8X8_MSG_GPIO_DC: // DC (data/cmd, A0, register select) pin: Output level in arg_int |
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if(arg_int) |
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PORTB |= (1<<4); |
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else |
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PORTB &= ~(1<<4); |
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break; |
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case U8X8_MSG_GPIO_RESET: // Reset pin: Output level in arg_int |
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if(arg_int) |
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PORTA |= (1<<7); |
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else |
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PORTA &= ~(1<<7); |
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break; |
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default: |
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u8x8_SetGPIOResult(u8x8, 1); // default return value |
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break; |
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} |
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return 1; |
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} |
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int main(void) |
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{ |
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u8g2_Setup_sh1106_128x64_vcomh0_f( |
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&u8g2, U8G2_R0, |
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u8x8_byte_avr_hw_spi, |
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u8x8_gpio_and_delay |
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); |
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u8g2_InitDisplay(&u8g2); |
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u8g2_SetPowerSave(&u8g2, 0); |
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while(1){ |
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u8g2_ClearBuffer(&u8g2); |
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u8g2_SetFont(&u8g2, u8g2_font_ncenB14_tr); |
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u8g2_DrawStr(&u8g2, 0, 15, "Hello!"); |
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u8g2_SendBuffer(&u8g2); |
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} |
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} |