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now able to drive all VFG parts

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This commit is contained in:
King Kévin 2016-01-21 13:06:51 +01:00
parent 515b52ec7b
commit 15100f6e21
3 changed files with 86 additions and 64 deletions
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99
lib/vfd.c
View File

@ -135,7 +135,7 @@ static const uint8_t ascii_7segments[] = {
* first value is left-most line
* LSB is top dot, MSB is not used
*/
static const uint8_t ascii_font5x7[][5] = {
static const uint8_t font5x7[][5] = {
{0x00, 0x00, 0x00, 0x00, 0x00}, // (space)
{0x00, 0x00, 0x5F, 0x00, 0x00}, // !
{0x00, 0x07, 0x00, 0x07, 0x00}, // "
@ -237,7 +237,7 @@ static const uint8_t ascii_font5x7[][5] = {
* first value is left-most line
* LSB is top dot, MSB is not used
*/
static const uint8_t ascii_pict5x7[][5] = {
static const uint8_t pict5x7[][5] = {
{0x08, 0x08, 0x2A, 0x1C, 0x08}, // ->
{0x08, 0x1C, 0x2A, 0x08, 0x08}, // <-
{0b01110000, 0b01110000, 0b01111010, 0b01111100, 0b01011000}, // bunny side 1
@ -255,23 +255,16 @@ static const uint8_t ascii_pict5x7[][5] = {
};
/* the three 32 bits values to be shifted out to the VFD driver */
static uint32_t vfd_data[3];
static uint32_t vfd_data[3] = {0};
/* the ten seven segments + dot displays
* actually they also have a comma and underline, but we want to save space
*/
//static uint8_t digits[10];
/* the twelve 5x7 dot matrix displays
* the last column dot/bit is not used, making them byte aligned
*/
//static uint8_t dots[12][5];
char vfd_digits[VFD_DIGITS] = {0};
char vfd_matrixs[VFD_MATRIX] = {0};
/* set digit <nb> to ASCII character <c>
* use the MSB of <c> to enable the dot */
void vfd_digit(uint8_t nb, char c)
{
// there are only 10 digits
if (nb>9) {
if (!(nb<VFD_DIGITS)) { // check the digit exists
return;
}
vfd_data[0] = 0;
@ -308,35 +301,34 @@ void vfd_digit(uint8_t nb, char c)
* non ASCII characters are used for pictures */
void vfd_matrix(uint8_t nb, char c)
{
// there are only 12 matrix
if (nb>11) {
if (!(nb<VFD_MATRIX)) { // check the matrix exists
return;
} else if (nb<4) {
vfd_data[0] = 0;
vfd_data[1] = 1<<(3-nb); // select digit
vfd_data[1] = 1<<(3-nb); // select matrix
} else {
vfd_data[0] = 1<<(35-nb); // select digit
vfd_data[0] = 1<<(35-nb); // select matrix
vfd_data[1] = 0;
}
vfd_data[2] = 0;
if ((c<0x80) && (c>=' ')) { // only take printable characters
uint8_t i = c-' '; // get index for character
if (i<LENGTH(ascii_font5x7)) {
vfd_data[1] |= ascii_font5x7[i][0]<<24;
vfd_data[2] |= ascii_font5x7[i][1]<<0;
vfd_data[2] |= ascii_font5x7[i][2]<<8;
vfd_data[2] |= ascii_font5x7[i][3]<<16;
vfd_data[2] |= ascii_font5x7[i][4]<<24;
if (i<LENGTH(font5x7)) {
vfd_data[1] |= font5x7[i][0]<<24;
vfd_data[2] |= font5x7[i][1]<<0;
vfd_data[2] |= font5x7[i][2]<<8;
vfd_data[2] |= font5x7[i][3]<<16;
vfd_data[2] |= font5x7[i][4]<<24;
}
} else if (c>0x7f) { // the non ASCII character are used for pictures
uint8_t i = c-0x80; // get index for character
if (i<LENGTH(ascii_pict5x7)) {
vfd_data[1] |= ascii_pict5x7[i][0]<<24;
vfd_data[2] |= ascii_pict5x7[i][1]<<0;
vfd_data[2] |= ascii_pict5x7[i][2]<<8;
vfd_data[2] |= ascii_pict5x7[i][3]<<16;
vfd_data[2] |= ascii_pict5x7[i][4]<<24;
if (i<LENGTH(pict5x7)) {
vfd_data[1] |= pict5x7[i][0]<<24;
vfd_data[2] |= pict5x7[i][1]<<0;
vfd_data[2] |= pict5x7[i][2]<<8;
vfd_data[2] |= pict5x7[i][3]<<16;
vfd_data[2] |= pict5x7[i][4]<<24;
}
}
}
@ -362,26 +354,45 @@ void vfd_shift(void)
gpio_set(VFD_PORT, VFD_NLE); // latch data
gpio_clear(VFD_PORT, VFD_STR); // enable HV output
gpio_clear(VFD_PORT, VFD_NLE); // stop latching data
// let the fluorescence glow up a bit
for (uint32_t i = 0; i < 0x2000; i++) {
__asm__("nop");
}
}
/* transmit each digit and dot */
/*
static void vfd_transmit(void)
/* transmit every digit and matrix */
void vfd_transmit(void)
{
// convert digits
for (uint8_t i=0; i<LENGTH(vfd_digits); i++) {
if (vfd_digits[i]==0) {
continue; // skip unused digits
}
vfd_digit(i,vfd_digits[i]); // set digit
vfd_shift(); // shift out data
// let the fluorescence glow up a bit
for (uint32_t j = 0; j < 0x2000; j++) {
__asm__("nop");
}
}
for (uint8_t i=0; i<LENGTH(vfd_matrixs); i++) {
if (vfd_matrixs[i]==0) {
continue; // skip unused matrix
}
vfd_matrix(i,vfd_matrixs[i]); // set matrix
vfd_shift(); // shift out data
// let the fluorescence glow up a bit
for (uint32_t j = 0; j < 0x2000; j++) {
__asm__("nop");
}
}
}
*/
/* clear VFD display
* the data has to be transmitted separately */
void vfd_clear(void)
{
for (uint8_t i=0; i<LENGTH(vfd_digits); i++) {
vfd_digits[i] = 0;
}
for (uint8_t i=0; i<LENGTH(vfd_matrixs); i++) {
vfd_matrixs[i] = 0;
}
for (uint8_t i=0; i<LENGTH(vfd_data); i++) {
vfd_data[i] = 0;
}
@ -391,6 +402,12 @@ void vfd_clear(void)
* the data has to be transmitted separately */
void vfd_test(void)
{
for (uint8_t i=0; i<LENGTH(vfd_digits); i++) {
vfd_digits[i] = '8';
}
for (uint8_t i=0; i<LENGTH(vfd_matrixs); i++) {
vfd_matrixs[i] = 0x80+LENGTH(pict5x7)-1;
}
for (uint8_t i=0; i<LENGTH(vfd_data); i++) {
vfd_data[i] = ~0;
}
@ -405,6 +422,8 @@ void vfd_setup(void)
gpio_set_mode(VFD_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, VFD_CLK); // set VFD pin to 'output push-pull'
gpio_set_mode(VFD_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, VFD_DIN); // set VFD pin to 'output push-pull'
vfd_clear(); // initialize values
gpio_set(VFD_PORT, VFD_STR); // disable HV output
gpio_clear(VFD_PORT, VFD_NLE); // do not latch data
gpio_set(VFD_PORT, VFD_CLK); // clock is idle high

10
lib/vfd.h
View File

@ -24,6 +24,14 @@
#define VFD_CLK GPIO6
#define VFD_DIN GPIO7
/* the number of blocks available on the VFD */
#define VFD_DIGITS 10
#define VFD_MATRIX 12
/* all digits and matrix values */
extern char vfd_digits[VFD_DIGITS];
extern char vfd_matrixs[VFD_MATRIX];
/* set digit <nb> to ASCII character <c>
* use the MSB of <c> to enable the dot */
void vfd_digit(uint8_t nb, char c);
@ -38,5 +46,7 @@ void vfd_clear(void);
/* test VFD display (light up all anodes)
* the data has to be transmitted separately */
void vfd_test(void);
/* transmit every digit and matrix */
void vfd_transmit(void);
/* setup VFD */
void vfd_setup(void);

41
main.c
View File

@ -33,6 +33,9 @@
#include "usb_cdcacm.h" // USB CDC ACM utilities
#include "vfd.h" // VFD driver
/* get the length of an array */
#define LENGTH(x) (sizeof(x) / sizeof((x)[0]))
/* default output (i.e. for printf) */
int _write(int file, char *ptr, int len)
{
@ -74,44 +77,34 @@ int main(void)
printf("welcome to the STM32F1 CuVoodoo display driver\n");
bool vfd_transmit = false;
uint8_t digit = 0;
uint8_t matrix = 0;
char c = 0x80;
vfd_clear();
vfd_shift();
for (uint32_t i = 0; i < 0x800000; i++) {
__asm__("nop");
}
vfd_test();
vfd_shift();
for (uint32_t i = 0; i < 0x800000; i++) {
__asm__("nop");
}
vfd_digit(digit,'0');
vfd_clear();
vfd_shift();
bool vfd_flag = false;
for (uint8_t i=0; i<LENGTH(vfd_digits); i++) {
vfd_digits[i] = '0'+i;
}
for (uint8_t i=0; i<LENGTH(vfd_matrixs); i++) {
vfd_matrixs[i] = 'A'+i;
}
while (true) {
while (usart_received) { // echo every received character
gpio_toggle(LED_PORT, LED_PIN); // toggle LED
printf("%c",usart_getchar()); // transmit receive character
vfd_transmit = true;
vfd_flag = true;
}
while (cdcacm_received) { // echo every received character
gpio_toggle(LED_PORT, LED_PIN); // toggle LED
printf("%c",cdcacm_getchar()); // transmit receive character
vfd_transmit = true;
vfd_flag = true;
}
while (vfd_transmit) {
vfd_transmit = false;
printf("%u: %c\n", matrix, c);
vfd_matrix(matrix,c);
vfd_shift();
matrix = (matrix+1)%12;
c++;
while (vfd_flag) {
//vfd_flag = false;
gpio_toggle(LED_PORT, LED_PIN); // toggle LED
vfd_transmit();
}
__WFI(); // go to sleep
}