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STM: add LCD functions for pixel access; add RNG Py bindings.

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This commit is contained in:
Damien 2013-11-09 20:15:48 +00:00
parent 5c13dbf6ee
commit 39c6c59868
4 changed files with 114 additions and 30 deletions
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110
stm/lcd.c
View File

@ -1,10 +1,16 @@
#include <string.h>
#include <stm32f4xx_gpio.h>
#include "nlr.h"
#include "misc.h"
#include "mpyconfig.h"
#include "parse.h"
#include "compile.h"
#include "runtime.h"
#include "systick.h"
#include "lcd.h"
#include "font_petme128_8x8.h"
#include "lcd.h"
#define PYB_LCD_PORT (GPIOA)
#define PYB_LCD_CS1_PIN (GPIO_Pin_0)
@ -80,14 +86,83 @@ static void lcd_data_out(uint8_t i) {
}
*/
// writes 8 vertical pixels
// pos 0 is upper left, pos 1 is 8 pixels to right of that, pos 128 is 8 pixels below that
py_obj_t lcd_draw_pixel_8(py_obj_t py_pos, py_obj_t py_val) {
int pos = py_obj_get_int(py_pos);
int val = py_obj_get_int(py_val);
int page = pos / 128;
int offset = pos - (page * 128);
lcd_out(LCD_INSTR, 0xb0 | page); // page address set
lcd_out(LCD_INSTR, 0x10 | ((offset >> 4) & 0x0f)); // column address set upper
lcd_out(LCD_INSTR, 0x00 | (offset & 0x0f)); // column address set lower
lcd_out(LCD_DATA, val); // write data
return py_const_none;
}
#define LCD_BUF_W (16)
#define LCD_BUF_H (4)
char lcd_buffer[LCD_BUF_W * LCD_BUF_H];
char lcd_char_buffer[LCD_BUF_W * LCD_BUF_H];
int lcd_line;
int lcd_column;
int lcd_next_line;
#define LCD_PIX_BUF_SIZE (128 * 32 / 8)
byte lcd_pix_buf[LCD_PIX_BUF_SIZE];
byte lcd_pix_buf2[LCD_PIX_BUF_SIZE];
py_obj_t lcd_pix_clear(void) {
memset(lcd_pix_buf, 0, LCD_PIX_BUF_SIZE);
memset(lcd_pix_buf2, 0, LCD_PIX_BUF_SIZE);
return py_const_none;
}
py_obj_t lcd_pix_get(py_obj_t py_x, py_obj_t py_y) {
int x = py_obj_get_int(py_x);
int y = py_obj_get_int(py_y);
if (0 <= x && x <= 127 && 0 <= y && y <= 31) {
uint byte_pos = x + 128 * ((uint)y >> 3);
if (lcd_pix_buf[byte_pos] & (1 << (y & 7))) {
return py_obj_new_int(1);
}
}
return py_obj_new_int(0);
}
py_obj_t lcd_pix_set(py_obj_t py_x, py_obj_t py_y) {
int x = py_obj_get_int(py_x);
int y = py_obj_get_int(py_y);
if (0 <= x && x <= 127 && 0 <= y && y <= 31) {
uint byte_pos = x + 128 * ((uint)y >> 3);
lcd_pix_buf2[byte_pos] |= 1 << (y & 7);
}
return py_const_none;
}
py_obj_t lcd_pix_reset(py_obj_t py_x, py_obj_t py_y) {
int x = py_obj_get_int(py_x);
int y = py_obj_get_int(py_y);
if (0 <= x && x <= 127 && 0 <= y && y <= 31) {
uint byte_pos = x + 128 * ((uint)y >> 3);
lcd_pix_buf2[byte_pos] &= ~(1 << (y & 7));
}
return py_const_none;
}
py_obj_t lcd_pix_show(void) {
memcpy(lcd_pix_buf, lcd_pix_buf2, LCD_PIX_BUF_SIZE);
for (uint page = 0; page < 4; page++) {
lcd_out(LCD_INSTR, 0xb0 | page); // page address set
lcd_out(LCD_INSTR, 0x10); // column address set upper; 0
lcd_out(LCD_INSTR, 0x00); // column address set lower; 0
for (uint i = 0; i < 128; i++) {
lcd_out(LCD_DATA, lcd_pix_buf[i + 128 * page]);
}
}
return py_const_none;
}
void lcd_init(void) {
// set the outputs high
PYB_LCD_PORT->BSRRL = PYB_LCD_CS1_PIN;
@ -132,11 +207,21 @@ void lcd_init(void) {
}
for (int i = 0; i < LCD_BUF_H * LCD_BUF_W; i++) {
lcd_buffer[i] = ' ';
lcd_char_buffer[i] = ' ';
}
lcd_line = 0;
lcd_column = 0;
lcd_next_line = 0;
// Python interface
py_obj_t m = py_module_new();
rt_store_attr(m, qstr_from_str_static("lcd8"), rt_make_function_2(lcd_draw_pixel_8));
rt_store_attr(m, qstr_from_str_static("clear"), rt_make_function_0(lcd_pix_clear));
rt_store_attr(m, qstr_from_str_static("get"), rt_make_function_2(lcd_pix_get));
rt_store_attr(m, qstr_from_str_static("set"), rt_make_function_2(lcd_pix_set));
rt_store_attr(m, qstr_from_str_static("reset"), rt_make_function_2(lcd_pix_reset));
rt_store_attr(m, qstr_from_str_static("show"), rt_make_function_0(lcd_pix_show));
rt_store_name(qstr_from_str_static("lcd"), m);
}
void lcd_print_str(const char *str) {
@ -155,10 +240,10 @@ void lcd_print_strn(const char *str, unsigned int len) {
} else {
lcd_line = LCD_BUF_H - 1;
for (int i = 0; i < LCD_BUF_W * (LCD_BUF_H - 1); i++) {
lcd_buffer[i] = lcd_buffer[i + LCD_BUF_W];
lcd_char_buffer[i] = lcd_char_buffer[i + LCD_BUF_W];
}
for (int i = 0; i < LCD_BUF_W; i++) {
lcd_buffer[LCD_BUF_W * (LCD_BUF_H - 1) + i] = ' ';
lcd_char_buffer[LCD_BUF_W * (LCD_BUF_H - 1) + i] = ' ';
}
redraw_min = 0;
redraw_max = LCD_BUF_W * LCD_BUF_H;
@ -174,7 +259,7 @@ void lcd_print_strn(const char *str, unsigned int len) {
str -= 1;
len += 1;
} else {
lcd_buffer[lcd_line * LCD_BUF_W + lcd_column] = *str;
lcd_char_buffer[lcd_line * LCD_BUF_W + lcd_column] = *str;
lcd_column += 1;
int max = lcd_line * LCD_BUF_W + lcd_column;
if (max > redraw_max) {
@ -193,7 +278,7 @@ void lcd_print_strn(const char *str, unsigned int len) {
lcd_out(LCD_INSTR, 0x00 | (offset & 0x0f)); // column address set lower
last_page = page;
}
int chr = lcd_buffer[i];
int chr = lcd_char_buffer[i];
if (chr < 32 || chr > 126) {
chr = 127;
}
@ -207,14 +292,3 @@ void lcd_print_strn(const char *str, unsigned int len) {
sys_tick_delay_ms(200);
}
}
// writes 8 vertical pixels
// pos 0 is upper left, pos 1 is 8 pixels to right of that, pos 128 is 8 pixels below that
void lcd_draw_pixel_8(int pos, int val) {
int page = pos / 128;
int offset = pos - (page * 128);
lcd_out(LCD_INSTR, 0xb0 | page); // page address set
lcd_out(LCD_INSTR, 0x10 | ((offset >> 4) & 0x0f)); // column address set upper
lcd_out(LCD_INSTR, 0x00 | (offset & 0x0f)); // column address set lower
lcd_out(LCD_DATA, val); // write data
}

1
stm/lcd.h
View File

@ -1,4 +1,3 @@
void lcd_init(void);
void lcd_print_str(const char *str);
void lcd_print_strn(const char *str, unsigned int len);
void lcd_draw_pixel_8(int pos, int val);

31
stm/main.c
View File

@ -6,6 +6,7 @@
#include <stm32f4xx_pwr.h>
#include <stm32f4xx_rtc.h>
#include <stm32f4xx_usart.h>
#include <stm32f4xx_rng.h>
#include <stm_misc.h>
#include "std.h"
@ -613,13 +614,6 @@ py_obj_t pyb_rtc_read(void) {
return py_const_none;
}
py_obj_t pyb_lcd8(py_obj_t pos, py_obj_t val) {
int pos_val = py_obj_get_int(pos);
int val_val = py_obj_get_int(val);
lcd_draw_pixel_8(pos_val, val_val);
return py_const_none;
}
void file_obj_print(py_obj_t o) {
FIL *fp;
py_user_get_data(o, (machine_uint_t*)&fp, NULL);
@ -695,6 +689,10 @@ py_obj_t pyb_io_open(py_obj_t o_filename, py_obj_t o_mode) {
return py_obj_new_user(&file_obj_info, (machine_uint_t)fp, 0);
}
py_obj_t pyb_rng_get(void) {
return py_obj_new_int(RNG_GetRandomNumber() >> 16);
}
int main(void) {
// TODO disable JTAG
@ -736,9 +734,6 @@ int main(void) {
soft_reset:
// LCD init
lcd_init();
// GC init
gc_init(&_heap_start, (void*)HEAP_END);
@ -746,6 +741,9 @@ soft_reset:
qstr_init();
rt_init();
// LCD init
lcd_init();
// servo
servo_init();
@ -755,6 +753,12 @@ soft_reset:
// timer
timer_init();
// RNG
{
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
RNG_Cmd(ENABLE);
}
// add some functions to the python namespace
{
py_obj_t m = py_module_new();
@ -774,7 +778,7 @@ soft_reset:
rt_store_attr(m, qstr_from_str_static("uout"), rt_make_function_1(pyb_usart_send));
rt_store_attr(m, qstr_from_str_static("uin"), rt_make_function_0(pyb_usart_receive));
rt_store_attr(m, qstr_from_str_static("ustat"), rt_make_function_0(pyb_usart_status));
rt_store_attr(m, qstr_from_str_static("lcd8"), rt_make_function_2(pyb_lcd8));
rt_store_attr(m, qstr_from_str_static("rng"), rt_make_function_0(pyb_rng_get));
rt_store_name(qstr_from_str_static("pyb"), m);
rt_store_name(qstr_from_str_static("open"), rt_make_function_2(pyb_io_open));
@ -1148,3 +1152,8 @@ double sqrt(double x) {
// TODO
return 0.0;
}
machine_float_t machine_sqrt(machine_float_t x) {
// TODO
return x;
}

2
stm/mpyconfig.h
View File

@ -14,3 +14,5 @@ typedef int32_t machine_int_t; // must be pointer size
typedef uint32_t machine_uint_t; // must be pointer size
typedef void *machine_ptr_t; // must be of pointer size
typedef float machine_float_t;
machine_float_t machine_sqrt(machine_float_t x);