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61 lines
1.5 KiB
61 lines
1.5 KiB
6 years ago
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#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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}
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