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vfd_hv518: fix all compilation and definition issues, and put some spaces

This commit is contained in:
King Kévin 2020-02-17 18:04:38 +01:00
parent 1dc728e40e
commit d2d09edaf8
2 changed files with 200 additions and 208 deletions
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403
lib/vfd_hv518.c
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@ -12,11 +12,11 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>. * along with this program. If not, see <http://www.gnu.org/licenses/>.
* *
*/ */
/** library to drive vacuum fluorescent display using supertex HV518 shift register VFD drivers (code) /** library to drive vacuum fluorescent display using supertex HV518 shift register VFD drivers
* @details the current configuration is for a VFD extracted from a Samsung SER-6500 cash register * @details the current configuration is for a VFD extracted from a Samsung SER-6500 cash register
* @file * @file
* @author King Kévin <kingkevin@cuvoodoo.info> * @author King Kévin <kingkevin@cuvoodoo.info>
* @date 2016 * @date 2016-2020
* @note peripherals used: SPI @ref vfd_hv518_spi , GPIO @ref vfd_hv518_gpio , timer @ref vfd_hv518_timer * @note peripherals used: SPI @ref vfd_hv518_spi , GPIO @ref vfd_hv518_gpio , timer @ref vfd_hv518_timer
*/ */
/* standard libraries */ /* standard libraries */
@ -36,131 +36,121 @@
/** @defgroup vfd_hv518_gpio GPIO to control supertex HV518 VFD drivers /** @defgroup vfd_hv518_gpio GPIO to control supertex HV518 VFD drivers
* @{ * @{
*/ */
#define VFD_PORT GPIOA /**< GPIO port */ #define VFD_STR_PIN PA6 /**< strobe pin to enable high voltage output, high voltage is output on low */
#define VFD_PORT_RCC RCC_GPIOA /**< GPIO port peripheral clock */ #define VFD_NLE_PIN PA4 /**< latch enable pin, stores the shifted data on low, output the parallel data on high */
#define VFD_STR GPIO6 /**< strobe pin to enable high voltage output, high voltage is output on low */
#define VFD_NLE GPIO4 /**< latch enable pin, stores the shifted data on low, output the parallel data on high */
/** @} */ /** @} */
/** @defgroup vfd_hv518_spi SPI to send data to supertex HV518 VFD drivers /** @defgroup vfd_hv518_spi SPI to send data to supertex HV518 VFD drivers
* @{ * @{
*/ */
#define VFD_SPI_RCC RCC_SPI1 /**< SPI peripheral */ #define VFD_SPI 1 /**< SPI peripheral */
#define VFD_SPI_PORT GPIOA /**< GPIO port */
#define VFD_SPI_PORT_RCC RCC_GPIOA /**< GPIO port peripheral clock */
#define VFD_SPI_IRQ NVIC_SPI1_IRQ /**< SPI peripheral interrupt signal */
#define VFD_SPI_ISR spi1_isr /**< SPI interrupt service routine */
#define VFD_CLK GPIO_SPI1_SCK /**< clock signal */
#define VFD_DIN GPIO_SPI1_MOSI /**< data input, where the data is shifted to */
/** @} */ /** @} */
/** @defgroup vfd_hv518_timer timer for automatic display blocks refresh /** @defgroup vfd_hv518_timer timer for automatic display blocks refresh
* @{ * @{
*/ */
#define VFD_TIMER_RCC RCC_TIM2 /**< timer peripheral clock */ #define VFD_TIMER 2 /**< timer peripheral ID */
#define VFD_TIMER_IRQ NVIC_TIM2_IRQ /**< timer interrupt signal */
#define VFD_TIMER_ISR tim2_isr /**< timer interrupt service routine */
/** @} */ /** @} */
/** ASCII characters encoded for the 7 segments digit block /** ASCII characters encoded for the 7 segments digit block
* @note starts with space * @note starts with space
*/ */
static const uint8_t ascii_7segments[] = { static const uint8_t ascii_7segments[] = {
0b00000000, // space 0x00, // 0b00000000, space
0b00110000, // ! (I) 0x30, // 0b00110000, ! (I)
0b00100010, // " 0x22, // 0b00100010, "
0b01011100, // # (o) 0x5c, // 0b01011100, # (o)
0b01101101, // $ (s) 0x6d, // 0b01101101, $ (s)
0b01010010, // % (/) 0x52, // 0b01010010, % (/)
0b01111101, // & (6) 0x7d, // 0b01111101, & (6)
0b00100000, // ' 0x20, // 0b00100000, '
0b00111001, // ( ([) 0x39, // 0b00111001, ( ([)
0b00001111, // ) 0x0f, // 0b00001111, )
0b01110000, // * 0x70, // 0b01110000, *
0b01000110, // + 0x46, // 0b01000110, +
0b00010000, // , 0x10, // 0b00010000, ,
0b01000000, // - 0x40, // 0b01000000, -
0b00010000, // . (,) 0x10, // 0b00010000, . (,)
0b01010010, // / 0x52, // 0b01010010, /
0b00111111, // 0 0x3f, // 0b00111111, 0
0b00000110, // 1 0x06, // 0b00000110, 1
0b01011011, // 2 0x5b, // 0b01011011, 2
0b01001111, // 3 0x4f, // 0b01001111, 3
0b01100110, // 4 0x66, // 0b01100110, 4
0b01101101, // 5 0x6d, // 0b01101101, 5
0b01111101, // 6 0x7d, // 0b01111101, 6
0b00000111, // 7 0x07, // 0b00000111, 7
0b01111111, // 8 0x7f, // 0b01111111, 8
0b01101111, // 9 0x6f, // 0b01101111, 9
0b01001000, // : (=) 0x48, // 0b01001000, : (=)
0b01001000, // ; (=) 0x48, // 0b01001000, ; (=)
0b01011000, // < 0x58, // 0b01011000, <
0b01001000, // = 0x48, // 0b01001000, =
0b01001100, // > 0x4c, // 0b01001100, >
0b01010011, // ? 0x53, // 0b01010011, ?
0b01111011, // @ 0x7b, // 0b01111011, @
0b01110111, // A 0x77, // 0b01110111, A
0b01111111, // B 0x7f, // 0b01111111, B
0b00111001, // C 0x39, // 0b00111001, C
0b01011110, // D 0x5e, // 0b01011110, D
0b01111001, // E 0x79, // 0b01111001, E
0b01110001, // F 0x71, // 0b01110001, F
0b00111101, // G 0x3d, // 0b00111101, G
0b01110110, // H 0x76, // 0b01110110, H
0b00110000, // I 0x30, // 0b00110000, I
0b00011110, // J 0x1e, // 0b00011110, J
0b01110110, // K 0x76, // 0b01110110, K
0b00111000, // L 0x38, // 0b00111000, L
0b00110111, // M 0x37, // 0b00110111, M
0b00110111, // N 0x37, // 0b00110111, N
0b00111111, // O 0x3f, // 0b00111111, O
0b01110011, // P 0x73, // 0b01110011, P
0b01101011, // Q 0x6b, // 0b01101011, Q
0b00110011, // R 0x33, // 0b00110011, R
0b01101101, // S 0x6d, // 0b01101101, S
0b01111000, // T 0x78, // 0b01111000, T
0b00111110, // U 0x3e, // 0b00111110, U
0b00111110, // V (U) 0x3e, // 0b00111110, V (U)
0b00111110, // W (U) 0x3e, // 0b00111110, W (U)
0b01110110, // X (H) 0x76, // 0b01110110, X (H)
0b01101110, // Y 0x6e, // 0b01101110, Y
0b01011011, // Z 0x5b, // 0b01011011, Z
0b00111001, // [ 0x39, // 0b00111001, [
0b01100100, // '\' 0x64, // 0b01100100, '\'
0b00001111, // / 0x0f, // 0b00001111, /
0b00100011, // ^ 0x23, // 0b00100011, ^
0b00001000, // _ 0x08, // 0b00001000, _
0b00000010, // ` 0x02, // 0b00000010, `
0b01011111, // a 0x5f, // 0b01011111, a
0b01111100, // b 0x7c, // 0b01111100, b
0b01011000, // c 0x58, // 0b01011000, c
0b01011110, // d 0x5e, // 0b01011110, d
0b01111011, // e 0x7b, // 0b01111011, e
0b01110001, // f 0x71, // 0b01110001, f
0b01101111, // g 0x6f, // 0b01101111, g
0b01110100, // h 0x74, // 0b01110100, h
0b00010000, // i 0x10, // 0b00010000, i
0b00001100, // j 0x0c, // 0b00001100, j
0b01110110, // k 0x76, // 0b01110110, k
0b00110000, // l 0x30, // 0b00110000, l
0b01010100, // m 0x54, // 0b01010100, m
0b01010100, // n 0x54, // 0b01010100, n
0b01011100, // o 0x5c, // 0b01011100, o
0b01110011, // p 0x73, // 0b01110011, p
0b01100111, // q 0x67, // 0b01100111, q
0b01010000, // r 0x50, // 0b01010000, r
0b01101101, // s 0x6d, // 0b01101101, s
0b01111000, // t 0x78, // 0b01111000, t
0b00011100, // u 0x1c, // 0b00011100, u
0b00011100, // v (u) 0x1c, // 0b00011100, v (u)
0b00011100, // w (u) 0x1c, // 0b00011100, w (u)
0b01110110, // x 0x76, // 0b01110110, x
0b01101110, // y 0x6e, // 0b01101110, y
0b01011011, // z 0x5b, // 0b01011011, z
0b00111001, // { ([) 0x39, // 0b00111001, { ([)
0b00110000, // | 0x30, // 0b00110000, |
0b00001111, // } ([) 0x0f, // 0b00001111, } ([)
0b01000000, // ~ 0x40, // 0b01000000, ~
}; };
/** font for the 5x7 dot matrix block /** font for the 5x7 dot matrix block
@ -262,7 +252,7 @@ static const uint8_t font5x7[][5] = {
{0x00, 0x08, 0x36, 0x41, 0x00}, // { {0x00, 0x08, 0x36, 0x41, 0x00}, // {
{0x00, 0x00, 0x7F, 0x00, 0x00}, // | {0x00, 0x00, 0x7F, 0x00, 0x00}, // |
{0x00, 0x41, 0x36, 0x08, 0x00}, // } {0x00, 0x41, 0x36, 0x08, 0x00}, // }
{0b00001000, 0b00000100, 0b00001100, 0b00001000, 0b00000100} // ~ {0x08, 0x04, 0x0c, 0x08, 0x04}, // ~ {0b00001000, 0b00000100, 0b00001100, 0b00001000, 0b00000100}
}; };
/** pictures for the 5x7 dot matrix block /** pictures for the 5x7 dot matrix block
@ -271,18 +261,18 @@ static const uint8_t font5x7[][5] = {
static const uint8_t pict5x7[][5] = { static const uint8_t pict5x7[][5] = {
{0x08, 0x08, 0x2A, 0x1C, 0x08}, // -> {0x08, 0x08, 0x2A, 0x1C, 0x08}, // ->
{0x08, 0x1C, 0x2A, 0x08, 0x08}, // <- {0x08, 0x1C, 0x2A, 0x08, 0x08}, // <-
{0b01110000, 0b01110000, 0b01111010, 0b01111100, 0b01011000}, // bunny side 1 {0x70, 0x70, 0x7a, 0x7c, 0x58}, // bunny side 1 {0b01110000, 0b01110000, 0b01111010, 0b01111100, 0b01011000}
{0b00100000, 0b01110000, 0b01110010, 0b01111100, 0b01011000}, // bunny side 2 {0x20, 0x70, 0x72, 0x7c, 0x58}, // bunny side 2 {0b00100000, 0b01110000, 0b01110010, 0b01111100, 0b01011000}
{0b00111110, 0b01001001, 0b01010110, 0b01001001, 0b00111110}, // bunny face 1 {0x3e, 0x49, 0x56, 0x49, 0x3e}, // bunny face 1 {0b00111110, 0b01001001, 0b01010110, 0b01001001, 0b00111110}
{0b00111110, 0b01010001, 0b01100110, 0b01010001, 0b00111110}, // bunny face 2 {0x3e, 0x51, 0x66, 0x51, 0x3e}, // bunny face 2 {0b00111110, 0b01010001, 0b01100110, 0b01010001, 0b00111110}
{0b00111000, 0b01010111, 0b01100100, 0b01010111, 0b00111000}, // bunny face 3 {0x38, 0x57, 0x64, 0x57, 0x38}, // bunny face 3 {0b00111000, 0b01010111, 0b01100100, 0b01010111, 0b00111000}
{0b00111000, 0b01001111, 0b01010100, 0b01001111, 0b00111000}, // bunny face 4 {0x38, 0x4f, 0x54, 0x4f, 0x38}, // bunny face 4 {0b00111000, 0b01001111, 0b01010100, 0b01001111, 0b00111000}
{0b00111000, 0b01011110, 0b01101000, 0b01011110, 0b00111000}, // bunny face 5 {0x38, 0x5e, 0x68, 0x5e, 0x38}, // bunny face 5 {0b00111000, 0b01011110, 0b01101000, 0b01011110, 0b00111000}
{0b01000001, 0b00110110, 0b00001000, 0b00110110, 0b01000001}, // cross 1 {0x41, 0x36, 0x08, 0x36, 0x41}, // cross 1 {0b01000001, 0b00110110, 0b00001000, 0b00110110, 0b01000001}
{~0b01000001, ~0b00110110, ~0b00001000, ~0b00110110, ~0b01000001}, // cross 1 negated {~0x41, ~0x36, ~0x08, ~0x36, ~0x41}, // cross 1 negated {~0b01000001, ~0b00110110, ~0b00001000, ~0b00110110, ~0b01000001}
{0b00100010, 0b00010100, 0b00001000, 0b00010100, 0b00100010}, // cross 2 {0x22, 0x14, 0x08, 0x14, 0x22}, // cross 2 {0b00100010, 0b00010100, 0b00001000, 0b00010100, 0b00100010}
{~0b00100010, ~0b00010100, ~0b00001000, ~0b00010100, ~0b00100010}, // cross 2 negated {~0x22, ~0x14, ~0x08, ~0x14, ~0x22}, // cross 2 negated {~0b00100010, ~0b00010100, ~0b00001000, ~0b00010100, ~0b00100010}
{0x00, 0x00, 0x00, 0x00, 0x00} // nothing {0x00, 0x00, 0x00, 0x00, 0x00}, // nothing
}; };
/** the 32 bits values to be shifted out to the VFD driver /** the 32 bits values to be shifted out to the VFD driver
@ -290,7 +280,7 @@ static const uint8_t pict5x7[][5] = {
* @note since the bits for digits and matrix are independent, they can be combined * @note since the bits for digits and matrix are independent, they can be combined
* @note we have more matrix (12) than digits (10) * @note we have more matrix (12) than digits (10)
*/ */
static uint16_t driver_data[VFD_MATRIX][VFD_DRIVERS*2] = {0}; static uint16_t driver_data[VFD_MATRIX][VFD_DRIVERS * 2] = {0};
/** which driver data is being transmitted */ /** which driver data is being transmitted */
static volatile uint8_t spi_i = 0; static volatile uint8_t spi_i = 0;
/** which grid/part to activate /** which grid/part to activate
@ -304,13 +294,13 @@ static const uint32_t digit_mask = 0x00fffff0;
void vfd_digit(uint8_t nb, char c) void vfd_digit(uint8_t nb, char c)
{ {
if (!(nb<VFD_DIGITS)) { // check the digit exists if (!(nb < VFD_DIGITS)) { // check the digit exists
return; return;
} }
uint32_t digit_data = 0; // the data to be shifted out for the driver (for the second driver) uint32_t digit_data = 0; // the data to be shifted out for the driver (for the second driver)
digit_data = 1<<(4+(9-nb)); // select digit digit_data = 1 << (4 + (9 - nb)); // select digit
/* encode segment /* encode segment
* here the bit order (classic 7 segment + underline and dot) * here the bit order (classic 7 segment + underline and dot)
* 3_ * 3_
@ -319,78 +309,78 @@ void vfd_digit(uint8_t nb, char c)
* 0_2, * 0_2,
* */ * */
if (false) { // add the underline (not encoded) if (false) { // add the underline (not encoded)
digit_data |= (1<<(14)); digit_data |= (1 << 14);
} }
if (c&0x80) { // add the dot (encoded in the 8th bit) if (c&0x80) { // add the dot (encoded in the 8th bit)
digit_data |= (1<<(15)); digit_data |= (1 << 15);
} }
if (false) { // add the comma (not encoded) if (false) { // add the comma (not encoded)
digit_data |= (1<<(16)); digit_data |= (1 << 16);
} }
c &= 0x7f; // only take the ASCII part c &= 0x7f; // only take the ASCII part
if (c>=' ') { // only take printable characters if (c >= ' ') { // only take printable characters
uint8_t i = c-' '; // get index for character uint8_t i = c - ' '; // get index for character
if (i<LENGTH(ascii_7segments)) { if (i < LENGTH(ascii_7segments)) {
digit_data |= (ascii_7segments[i]<<(17)); // add encoded segments to memory digit_data |= (ascii_7segments[i] << 17); // add encoded segments to memory
} }
} }
digit_data &= digit_mask; // be sure only the bits for the digit are used digit_data &= digit_mask; // be sure only the bits for the digit are used
digit_data |= (driver_data[nb][2]+(driver_data[nb][3]<<16))&~digit_mask; // get the existing data and add the bits for the digit digit_data |= (driver_data[nb][2] + (driver_data[nb][3] << 16)) & ~digit_mask; // get the existing data and add the bits for the digit
driver_data[nb][2] = digit_data; // write back data (least significant half) driver_data[nb][2] = digit_data; // write back data (least significant half)
driver_data[nb][3] = (digit_data>>16); // write back data (most significant half) driver_data[nb][3] = (digit_data >> 16); // write back data (most significant half)
} }
void vfd_matrix(uint8_t nb, char c) void vfd_matrix(uint8_t nb, char c)
{ {
// check the matrix exists // check the matrix exists
if (!(nb<VFD_MATRIX)) { if (!(nb < VFD_MATRIX)) {
return; return;
} }
uint32_t matrix_data[VFD_DRIVERS] = {0}; // the data to be shifted out for the driver uint32_t matrix_data[VFD_DRIVERS] = {0}; // the data to be shifted out for the driver
// select matrix // select matrix
if (nb<4) { if (nb < 4) {
matrix_data[1] = 1<<(3-nb); matrix_data[1] = 1 << (3 - nb);
} else { } else {
matrix_data[0] = 1<<(35-nb); matrix_data[0] = 1 << (35 - nb);
} }
if ((c<0x80) && (c>=' ')) { // only take printable characters if ((c < 0x80) && (c >= ' ')) { // only take printable characters
uint8_t i = c-' '; // get index for character uint8_t i = c - ' '; // get index for character
if (i<LENGTH(font5x7)) { if (i < LENGTH(font5x7)) {
matrix_data[1] |= font5x7[i][0]<<24; matrix_data[1] |= font5x7[i][0] << 24;
matrix_data[2] |= font5x7[i][1]<<0; matrix_data[2] |= font5x7[i][1] << 0;
matrix_data[2] |= font5x7[i][2]<<8; matrix_data[2] |= font5x7[i][2] << 8;
matrix_data[2] |= font5x7[i][3]<<16; matrix_data[2] |= font5x7[i][3] << 16;
matrix_data[2] |= font5x7[i][4]<<24; matrix_data[2] |= font5x7[i][4] << 24;
} }
} else if (c>0x7f) { // the non ASCII character are used for pictures } else if (c > 0x7f) { // the non ASCII character are used for pictures
uint8_t i = c-0x80; // get index for character uint8_t i = c - 0x80; // get index for character
if (i<LENGTH(pict5x7)) { if (i < LENGTH(pict5x7)) {
matrix_data[1] |= pict5x7[i][0]<<24; matrix_data[1] |= pict5x7[i][0] << 24;
matrix_data[2] |= pict5x7[i][1]<<0; matrix_data[2] |= pict5x7[i][1] << 0;
matrix_data[2] |= pict5x7[i][2]<<8; matrix_data[2] |= pict5x7[i][2] << 8;
matrix_data[2] |= pict5x7[i][3]<<16; matrix_data[2] |= pict5x7[i][3] << 16;
matrix_data[2] |= pict5x7[i][4]<<24; matrix_data[2] |= pict5x7[i][4] << 24;
} }
} }
matrix_data[1] &= ~digit_mask; // be sure only the bits for the matrix are used matrix_data[1] &= ~digit_mask; // be sure only the bits for the matrix are used
matrix_data[1] |= (driver_data[nb][2]+(driver_data[nb][3]<<16))&digit_mask; // get the existing data for the digit matrix_data[1] |= (driver_data[nb][2] + (driver_data[nb][3] << 16)) & digit_mask; // get the existing data for the digit
// prepare the data for SPI to shift it out // prepare the data for SPI to shift it out
for (uint8_t i=0; i<LENGTH(matrix_data); i++) { for (uint8_t i = 0; i < LENGTH(matrix_data); i++) {
driver_data[nb][i*2] = matrix_data[i]; driver_data[nb][i * 2] = matrix_data[i];
driver_data[nb][i*2+1] = matrix_data[i]>>16; driver_data[nb][i * 2 + 1] = matrix_data[i] >> 16;
} }
} }
void vfd_clear(void) void vfd_clear(void)
{ {
for (uint8_t i=0; i<LENGTH(driver_data); i++) { for (uint8_t i = 0; i < LENGTH(driver_data); i++) {
for (uint8_t j=0; j<LENGTH(driver_data[0]); j++) { for (uint8_t j = 0; j < LENGTH(driver_data[0]); j++) {
driver_data[i][j] = 0; driver_data[i][j] = 0;
} }
} }
@ -398,8 +388,8 @@ void vfd_clear(void)
void vfd_test(void) void vfd_test(void)
{ {
for (uint8_t i=0; i<LENGTH(driver_data); i++) { for (uint8_t i = 0; i < LENGTH(driver_data); i++) {
for (uint8_t j=0; j<LENGTH(driver_data[0]); j++) { for (uint8_t j = 0; j < LENGTH(driver_data[0]); j++) {
driver_data[i][j] = ~0; driver_data[i][j] = ~0;
} }
} }
@ -407,33 +397,34 @@ void vfd_test(void)
void vfd_on(void) void vfd_on(void)
{ {
gpio_clear(VFD_PORT, VFD_STR); // enable HV output gpio_clear(GPIO_PORT(VFD_STR_PIN), GPIO_PIN(VFD_STR_PIN)); // enable HV output
timer_enable_counter(VFD_TIMER); // start timer to periodically output that to the parts timer_enable_counter(TIM(VFD_TIMER)); // start timer to periodically output that to the parts
} }
void vfd_off(void) void vfd_off(void)
{ {
gpio_set(VFD_PORT, VFD_STR); // disable HV output gpio_set(GPIO_PORT(VFD_STR_PIN), GPIO_PIN(VFD_STR_PIN)); // disable HV output
timer_disable_counter(VFD_TIMER); // stop timer to periodically output that to the parts timer_disable_counter(TIM(VFD_TIMER)); // stop timer to periodically output that to the parts
} }
void vfd_setup(void) void vfd_setup(void)
{ {
/* setup GPIO to control the VFD */ /* setup GPIO to control the VFD */
rcc_periph_clock_enable(VFD_PORT_RCC); // enable clock for VFD GPIO rcc_periph_clock_enable(GPIO_RCC(VFD_STR_PIN)); // enable clock for VFD GPIO
gpio_set_mode(VFD_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, VFD_STR); // set VFD pin to output push-pull gpio_set(GPIO_PORT(VFD_STR_PIN), GPIO_PIN(VFD_STR_PIN)); // disable HV output
gpio_set_mode(VFD_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, VFD_NLE); // set VFD pin to output push-pull gpio_set_mode(GPIO_PORT(VFD_STR_PIN), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO_PIN(VFD_STR_PIN)); // set VFD pin to output push-pull
rcc_periph_clock_enable(GPIO_RCC(VFD_NLE_PIN)); // enable clock for VFD GPIO
gpio_set(VFD_PORT, VFD_STR); // disable HV output gpio_clear(GPIO_PORT(VFD_NLE_PIN), GPIO_PIN(VFD_NLE_PIN)); // do not output latched data
gpio_clear(VFD_PORT, VFD_NLE); // do not output latched data gpio_set_mode(GPIO_PORT(VFD_NLE_PIN), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO_PIN(VFD_NLE_PIN)); // set VFD pin to output push-pull
/* setup SPI to transmit data */ /* setup SPI to transmit data */
rcc_periph_clock_enable(VFD_SPI_RCC); // enable SPI clock rcc_periph_clock_enable(RCC_SPI(VFD_SPI)); // enable SPI clock
rcc_periph_clock_enable(VFD_SPI_PORT_RCC); // enable clock for VFD SPI GPIO rcc_periph_clock_enable(RCC_SPI_SCK_PORT(VFD_SPI)); // enable clock for VFD SPI GPIO
gpio_set_mode(VFD_SPI_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, VFD_CLK); // set VFD pin to alternative function push-pull rcc_periph_clock_enable(RCC_SPI_MOSI_PORT(VFD_SPI)); // enable clock for VFD SPI GPIO
gpio_set_mode(VFD_SPI_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, VFD_DIN); // set VFD pin to alternative function push-pull gpio_set_mode(SPI_SCK_PORT(VFD_SPI), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, SPI_SCK_PIN(VFD_SPI)); // set VFD pin to alternative function push-pull
gpio_set_mode(SPI_MOSI_PORT(VFD_SPI), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, SPI_MOSI_PIN(VFD_SPI)); // set VFD pin to alternative function push-pull
spi_reset(VFD_SPI); // clear SPI values spi_reset(SPI(VFD_SPI)); // clear SPI values
/* set SPI: /* set SPI:
* - use VFD_SPI port * - use VFD_SPI port
* - divide clock by 8 for generating the baudrate (F_PCLK1 is 36MHz, max HV518 is 6MHz) * - divide clock by 8 for generating the baudrate (F_PCLK1 is 36MHz, max HV518 is 6MHz)
@ -442,56 +433,56 @@ void vfd_setup(void)
* - send 16 bits at a time * - send 16 bits at a time
* - send least significant bit first (that's how I coded the data) * - send least significant bit first (that's how I coded the data)
*/ */
spi_init_master(VFD_SPI, SPI_CR1_BAUDRATE_FPCLK_DIV_8, SPI_CR1_CPOL_CLK_TO_1_WHEN_IDLE, SPI_CR1_CPHA_CLK_TRANSITION_2, SPI_CR1_DFF_16BIT, SPI_CR1_LSBFIRST); spi_init_master(SPI(VFD_SPI), SPI_CR1_BAUDRATE_FPCLK_DIV_8, SPI_CR1_CPOL_CLK_TO_1_WHEN_IDLE, SPI_CR1_CPHA_CLK_TRANSITION_2, SPI_CR1_DFF_16BIT, SPI_CR1_LSBFIRST);
//spi_set_bidirectional_transmit_only_mode(VFD_SPI); // only use MOSI to transmit //spi_set_bidirectional_transmit_only_mode(VFD_SPI); // only use MOSI to transmit
spi_set_unidirectional_mode(VFD_SPI); // MISO is unused spi_set_unidirectional_mode(SPI(VFD_SPI)); // MISO is unused
/* set NSS high to enable transmission /* set NSS high to enable transmission
* the NSS in STM32 can not be used as hardware slave select * the NSS in STM32 can not be used as hardware slave select
* RM0008 reference manual 25.3.1 is misleading * RM0008 reference manual 25.3.1 is misleading
* when hardware NSS is used and output is enabled NSS never goes up after transmission, even if SPI is disabled * when hardware NSS is used and output is enabled NSS never goes up after transmission, even if SPI is disabled
* when software NSS is used, NSS can not be set high again, even when writing to the register * when software NSS is used, NSS can not be set high again, even when writing to the register
* the slave select must be done manually using GPIO */ * the slave select must be done manually using GPIO */
spi_enable_software_slave_management(VFD_SPI); spi_enable_software_slave_management(SPI(VFD_SPI));
spi_set_nss_high(VFD_SPI); // set NSS high spi_set_nss_high(SPI(VFD_SPI)); // set NSS high
nvic_enable_irq(VFD_SPI_IRQ); // enable SPI interrupt nvic_enable_irq(SPI_IRQ(VFD_SPI)); // enable SPI interrupt
spi_enable(VFD_SPI); // enable SPI (the tx empty interrupt will trigger) spi_enable(SPI(VFD_SPI)); // enable SPI (the tx empty interrupt will trigger)
/* setup timer to refresh display */ /* setup timer to refresh display */
rcc_periph_clock_enable(VFD_TIMER_RCC); // enable clock for timer block rcc_periph_clock_enable(RCC_TIM(VFD_TIMER)); // enable clock for timer block
rcc_periph_reset_pulse(RST_VFD_TIMER); // reset timer state rcc_periph_reset_pulse(RST_TIM(VFD_TIMER)); // reset timer state
timer_set_mode(VFD_TIMER, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // set timer mode, use undivided timer clock,edge alignment (simple count), and count up timer_set_mode(TIM(VFD_TIMER), TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // set timer mode, use undivided timer clock,edge alignment (simple count), and count up
timer_set_prescaler(VFD_TIMER, (SYSTEM_CLOCK_FREQ/(1<<16))-1); // set the prescaler so this 16 bits timer overflows at 1Hz timer_set_prescaler(TIM(VFD_TIMER), (rcc_ahb_frequency / (1 << 16)) - 1); // set the prescaler so this 16 bits timer overflows at 1Hz
timer_set_period(VFD_TIMER, 0xffff/LENGTH(driver_data)/100); // set the refresh frequency timer_set_period(TIM(VFD_TIMER), 0xffff / LENGTH(driver_data) / 100); // set the refresh frequency
timer_enable_irq(VFD_TIMER, TIM_DIER_UIE); // enable interrupt for timer timer_enable_irq(TIM(VFD_TIMER), TIM_DIER_UIE); // enable interrupt for timer
nvic_enable_irq(VFD_TIMER_IRQ); // allow interrupt for timer nvic_enable_irq(NVIC_TIM_IRQ(VFD_TIMER)); // allow interrupt for timer
vfd_clear(); // initialize values vfd_clear(); // initialize values
} }
/** SPI interrupt service routine called when data has been transmitted */ /** SPI interrupt service routine called when data has been transmitted */
void VFD_SPI_ISR(void) void SPI_ISR(VFD_SPI)(void)
{ {
if (SPI_SR(VFD_SPI) & SPI_SR_TXE) { // transmission buffer empty if (SPI_SR(SPI(VFD_SPI)) & SPI_SR_TXE) { // transmission buffer empty
if (spi_i<LENGTH(driver_data[0])) { // check if data is available if (spi_i < LENGTH(driver_data[0])) { // check if data is available
gpio_clear(VFD_PORT, VFD_NLE); // slave select to latch data gpio_clear(GPIO_PORT(VFD_NLE_PIN), GPIO_PIN(VFD_NLE_PIN)); // slave select to latch data
spi_send(VFD_SPI, driver_data[vfd_grid][spi_i++]); // send next data spi_send(SPI(VFD_SPI), driver_data[vfd_grid][spi_i++]); // send next data
} else { // all data transmitted } else { // all data transmitted
spi_disable_tx_buffer_empty_interrupt(VFD_SPI); // no need to wait for new data spi_disable_tx_buffer_empty_interrupt(SPI(VFD_SPI)); // no need to wait for new data
while (SPI_SR(VFD_SPI) & SPI_SR_BSY); // wait for data to be shifted out while (SPI_SR(SPI(VFD_SPI)) & SPI_SR_BSY); // wait for data to be shifted out
spi_disable_tx_buffer_empty_interrupt(VFD_SPI); // no need to wait for new data spi_disable_tx_buffer_empty_interrupt(SPI(VFD_SPI)); // no need to wait for new data
gpio_set(VFD_PORT, VFD_NLE); // output latched data gpio_set(GPIO_PORT(VFD_NLE_PIN), GPIO_PIN(VFD_NLE_PIN)); // output latched data
} }
} }
} }
/** timer interrupt service routine called time passed */ /** timer interrupt service routine called time passed */
void VFD_TIMER_ISR(void) void TIM_ISR(VFD_TIMER)(void)
{ {
if (timer_get_flag(VFD_TIMER, TIM_SR_UIF)) { // overflow even happened if (timer_get_flag(TIM(VFD_TIMER), TIM_SR_UIF)) { // overflow even happened
timer_clear_flag(VFD_TIMER, TIM_SR_UIF); // clear flag timer_clear_flag(TIM(VFD_TIMER), TIM_SR_UIF); // clear flag
spi_i = 0; // set the register to shift out spi_i = 0; // set the register to shift out
spi_enable_tx_buffer_empty_interrupt(VFD_SPI); // enable TX empty interrupt spi_enable_tx_buffer_empty_interrupt(SPI(VFD_SPI)); // enable TX empty interrupt
vfd_grid = (vfd_grid+1)%LENGTH(driver_data); // got to next segment vfd_grid = (vfd_grid + 1) % LENGTH(driver_data); // got to next segment
} }
} }

5
lib/vfd_hv518.h
View File

@ -12,13 +12,14 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>. * along with this program. If not, see <http://www.gnu.org/licenses/>.
* *
*/ */
/** library to drive vacuum fluorescent display using supertex HV518 shift register VFD drivers (API) /** library to drive vacuum fluorescent display using supertex HV518 shift register VFD drivers
* @details the current configuration is for a VFD extracted from a Samsung SER-6500 cash register * @details the current configuration is for a VFD extracted from a Samsung SER-6500 cash register
* @file * @file
* @author King Kévin <kingkevin@cuvoodoo.info> * @author King Kévin <kingkevin@cuvoodoo.info>
* @date 2016 * @date 2016-2020
* @note peripherals used: SPI @ref vfd_hv518_spi , GPIO @ref vfd_hv518_gpio , timer @ref vfd_hv518_timer * @note peripherals used: SPI @ref vfd_hv518_spi , GPIO @ref vfd_hv518_gpio , timer @ref vfd_hv518_timer
*/ */
#pragma once
/** number HV518 VFD drivers */ /** number HV518 VFD drivers */
#define VFD_DRIVERS 3 #define VFD_DRIVERS 3