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Add sys/avr/lib

This commit is contained in:
Fabio Pugliese Ornellas 2018-05-26 12:24:40 +01:00
parent 981f54213b
commit 746daf1306
5 changed files with 149 additions and 161 deletions
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159
sys/avr/at90usb1286/main.c
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@ -1,159 +0,0 @@
#include <u8g2.h>
#include <util/delay.h>
u8g2_t u8g2;
uint8_t u8x8_byte_4wire_hw_spi(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) {
uint8_t *data;
switch(msg) {
case U8X8_MSG_BYTE_INIT:
// CLOCK (SCLK)
DDRB |= (1 << 1);
// DATA (MOSI)
DDRB |= (1 << 2);
// SPI2X: Double SPI Speed bit
SPSR |= (1 << SPI2X);
// Enable / Master
SPCR = ((1 << SPE) | (1 << MSTR));
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
break;
case U8X8_MSG_BYTE_SET_DC:
u8x8_gpio_SetDC(u8x8, arg_int);
break;
case U8X8_MSG_BYTE_START_TRANSFER:
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
break;
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 ) {
SPDR = (uint8_t)*data;
while (!(SPSR & _BV(SPIF)));
data++;
arg_int--;
}
break;
case U8X8_MSG_BYTE_END_TRANSFER:
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
break;
default:
return 0;
}
return 1;
}
uint8_t u8x8_gpio_and_delay(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
switch(msg){
case U8X8_MSG_GPIO_AND_DELAY_INIT: // called once during init phase of u8g2/u8x8
DDRB |= (1<<0); // CS
DDRB |= (1<<4); // DC
DDRA |= (1<<7); // RESET
break; // can be used to setup pins
case U8X8_MSG_DELAY_NANO: // delay arg_int * 1 nano second
// At 16Mhz, 1 instruction = 62.5ns, no action here.
break;
case U8X8_MSG_DELAY_100NANO: // delay arg_int * 100 nano seconds
// At 16Mhz, 1 instruction = 62.5ns, no action here.
break;
case U8X8_MSG_DELAY_10MICRO: // delay arg_int * 10 micro seconds
for(int i=0 ; i < arg_int ; i++)
_delay_us(10);
break;
case U8X8_MSG_DELAY_MILLI: // delay arg_int * 1 milli second
for(int i=0 ; i < arg_int ; i++)
_delay_ms(1);
break;
// case U8X8_MSG_DELAY_I2C: // arg_int is the I2C speed in 100KHz, e.g. 4 = 400 KHz
// break; // arg_int=1: delay by 5us, arg_int = 4: delay by 1.25us
// case U8X8_MSG_GPIO_D0: // D0 or SPI clock pin: Output level in arg_int
// case U8X8_MSG_GPIO_SPI_CLOCK:
// if(arg_int)
// PORTB |= (1<<1);
// else
// PORTB &= ~(1<<1);
// break;
// case U8X8_MSG_GPIO_D1: // D1 or SPI data pin: Output level in arg_int
// //case U8X8_MSG_GPIO_SPI_DATA:
// if(arg_int)
// PORTB |= (1<<2);
// else
// PORTB &= ~(1<<2);
// break;
// case U8X8_MSG_GPIO_D2: // D2 pin: Output level in arg_int
// break;
// case U8X8_MSG_GPIO_D3: // D3 pin: Output level in arg_int
// break;
// case U8X8_MSG_GPIO_D4: // D4 pin: Output level in arg_int
// break;
// case U8X8_MSG_GPIO_D5: // D5 pin: Output level in arg_int
// break;
// case U8X8_MSG_GPIO_D6: // D6 pin: Output level in arg_int
// break;
// case U8X8_MSG_GPIO_D7: // D7 pin: Output level in arg_int
// break;
// case U8X8_MSG_GPIO_E: // E/WR pin: Output level in arg_int
// break;
case U8X8_MSG_GPIO_CS: // CS (chip select) pin: Output level in arg_int
if(arg_int)
PORTB |= (1<<0);
else
PORTB &= ~(1<<0);
break;
case U8X8_MSG_GPIO_DC: // DC (data/cmd, A0, register select) pin: Output level in arg_int
if(arg_int)
PORTB |= (1<<4);
else
PORTB &= ~(1<<4);
break;
case U8X8_MSG_GPIO_RESET: // Reset pin: Output level in arg_int
if(arg_int)
PORTA |= (1<<7);
else
PORTA &= ~(1<<7);
break;
// case U8X8_MSG_GPIO_CS1: // CS1 (chip select) pin: Output level in arg_int
// break;
// case U8X8_MSG_GPIO_CS2: // CS2 (chip select) pin: Output level in arg_int
// break;
// case U8X8_MSG_GPIO_I2C_CLOCK: // arg_int=0: Output low at I2C clock pin
// break; // arg_int=1: Input dir with pullup high for I2C clock pin
// case U8X8_MSG_GPIO_I2C_DATA: // arg_int=0: Output low at I2C data pin
// break; // arg_int=1: Input dir with pullup high for I2C data pin
// case U8X8_MSG_GPIO_MENU_SELECT:
// u8x8_SetGPIOResult(u8x8, /* get menu select pin state */ 0);
// break;
// case U8X8_MSG_GPIO_MENU_NEXT:
// u8x8_SetGPIOResult(u8x8, /* get menu next pin state */ 0);
// break;
// case U8X8_MSG_GPIO_MENU_PREV:
// u8x8_SetGPIOResult(u8x8, /* get menu prev pin state */ 0);
// break;
// case U8X8_MSG_GPIO_MENU_HOME:
// u8x8_SetGPIOResult(u8x8, /* get menu home pin state */ 0);
// break;
default:
u8x8_SetGPIOResult(u8x8, 1); // default return value
break;
}
return 1;
}
int main(void)
{
u8g2_Setup_sh1106_128x64_vcomh0_f(
&u8g2, U8G2_R0,
u8x8_byte_4wire_hw_spi, u8x8_gpio_and_delay
);
u8g2_InitDisplay(&u8g2);
u8g2_SetPowerSave(&u8g2, 0);
while(1){
for(uint8_t i=0;i<(128-20);i++){
u8g2_ClearBuffer(&u8g2);
u8g2_DrawBox(&u8g2, i,0,20,64);
u8g2_SendBuffer(&u8g2);
}
}
}

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

6
sys/avr/at90usb1286/makefile → sys/avr/hello/makefile
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@ -4,6 +4,7 @@ SIZE = avr-size
MCU = at90usb1286
F_CPU = 16000000
U8G2_SRC = ../../../csrc
AVR_LIB_SRC = ../lib
CFLAGS = \
-mmcu=$(MCU) \
-DF_CPU=$(F_CPU)UL \
@ -12,12 +13,13 @@ CFLAGS = \
-Werror \
-ffunction-sections \
-fdata-sections \
-I$(U8G2_SRC)/
-I$(U8G2_SRC)/ \
-I$(AVR_LIB_SRC)
LDFLAGS = \
-Wl,--gc-sections \
-mmcu=$(MCU)
SRC = $(shell ls $(U8G2_SRC)/*.c) main.c
SRC = $(shell ls $(U8G2_SRC)/*.c) $(shell ls $(AVR_LIB_SRC)/*.c) main.c
OBJ = $(SRC:.c=.o)

79
sys/avr/lib/u8x8_avr.c Normal file
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@ -0,0 +1,79 @@
#include "u8x8_avr.h"
#include <util/delay.h>
#define P_CPU_NS (1000000000UL / F_CPU)
uint8_t u8x8_byte_avr_hw_spi(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) {
uint8_t *data;
switch(msg) {
case U8X8_MSG_BYTE_INIT:
DDRB |= (1 << 1); // CLOCK (SCLK)
DDRB |= (1 << 2); // DATA (MOSI)
SPSR |= (1 << SPI2X); // SPI2X: Double SPI Speed bit
SPCR = ((1 << SPE) | (1 << MSTR)); // Enable / Master
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
break;
case U8X8_MSG_BYTE_SET_DC:
u8x8_gpio_SetDC(u8x8, arg_int);
break;
case U8X8_MSG_BYTE_START_TRANSFER:
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
break;
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 ) {
SPDR = (uint8_t)*data;
while (!(SPSR & _BV(SPIF)));
data++;
arg_int--;
}
break;
case U8X8_MSG_BYTE_END_TRANSFER:
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
break;
default:
return 0;
}
return 1;
}
uint8_t u8x8_avr_delay(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
uint8_t cycles;
switch(msg){
case U8X8_MSG_DELAY_NANO: // delay arg_int * 1 nano second
// At 20Mhz, each cycle is 50ns, the call itself is slower.
break;
case U8X8_MSG_DELAY_100NANO: // delay arg_int * 100 nano seconds
// Approximate best case values...
#define CALL_CYCLES 26UL
#define CALC_CYCLES 4UL
#define RETURN_CYCLES 4UL
#define CYCLES_PER_LOOP 4UL
cycles = (100UL * arg_int) / (P_CPU_NS * CYCLES_PER_LOOP);
if(cycles > CALL_CYCLES + RETURN_CYCLES + CALC_CYCLES) break;
__asm__ __volatile__ (
"1: sbiw %0,1" "\n\t" // 2 cycles
"brne 1b" : "=w" (cycles) : "0" (cycles) // 2 cycles
);
break;
case U8X8_MSG_DELAY_10MICRO: // delay arg_int * 10 micro seconds
for(int i=0 ; i < arg_int ; i++)
_delay_us(10);
break;
case U8X8_MSG_DELAY_MILLI: // delay arg_int * 1 milli second
for(int i=0 ; i < arg_int ; i++)
_delay_ms(1);
break;
default:
return 0;
}
return 1;
}

5
sys/avr/lib/u8x8_avr.h Normal file
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@ -0,0 +1,5 @@
#include <u8g2.h>
#include <stdint.h>
uint8_t u8x8_byte_avr_hw_spi(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);
uint8_t u8x8_avr_delay(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);