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jlechner |
#include "dis7seg.h"
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#define CMD_SETVALUE 0x40
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#define CMD_SETDOT 0x80
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#define CMD_GETVALUE 0xC0
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#define MIN(x,y) (((x) < (y)) ? (x) : (y))
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void dis7seg_initHandle(dis7seg_handle_t *h, scarts_addr_t baseAddress, uint8_t segmentCount) {
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h->baseAddress = baseAddress;
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h->segmentCount = segmentCount;
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}
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void dis7seg_releaseHandle(dis7seg_handle_t *h) {
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}
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void dis7seg_setPrescaler(dis7seg_handle_t *h, uint16_t value) {
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volatile uint16_t *reg = (uint16_t *)(h->baseAddress+DISP7SEG_PRESC_L_BOFF);
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*reg = value;
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}
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void dis7seg_setDigitValue(dis7seg_handle_t *h, uint8_t index, uint8_t value) {
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volatile uint8_t *reg;
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reg = (uint8_t *)(h->baseAddress+DISP7SEG_DISPLAY_CMD);
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*reg = CMD_SETVALUE | (index & 0x3F);
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reg = (uint8_t *)(h->baseAddress+DISP7SEG_DISPLAY_VALUE);
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*reg = value;
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}
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void dis7seg_displayUInt8(dis7seg_handle_t *h, uint8_t index, uint8_t value) {
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int i=0;
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for (i=0; i<MIN(3, h->segmentCount); i++) {
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dis7seg_setDigitValue(h, index+i, (value % 10));
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value /= 10;
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}
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}
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void dis7seg_displayUInt16(dis7seg_handle_t *h, uint8_t index, uint16_t value) {
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int i=0;
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for (i=0; i<MIN(5, h->segmentCount); i++) {
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dis7seg_setDigitValue(h, index+i, (value % 10));
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value /= 10;
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}
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}
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void dis7seg_displayUInt32(dis7seg_handle_t *h, uint8_t index, uint32_t value) {
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int i=0;
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for (i=0; i<MIN(10, h->segmentCount); i++) {
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dis7seg_setDigitValue(h, index+i, (value % 10));
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value /= 10;
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}
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}
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void dis7seg_displayHexUInt8(dis7seg_handle_t *h, uint8_t index, uint8_t value) {
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dis7seg_setDigitValue(h, index, value & 0x0F);
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dis7seg_setDigitValue(h, index+1, value >> 4);
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}
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void dis7seg_displayHexUInt16(dis7seg_handle_t *h, uint8_t index, uint16_t value) {
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int i=0;
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for (i=0; i<4; i++) {
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dis7seg_setDigitValue(h, index+i, value >> (i*4) & 0x000F);
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}
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}
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void dis7seg_displayHexUInt32(dis7seg_handle_t *h, uint8_t index, uint32_t value) {
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int i=0;
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for (i=0; i<8; i++) {
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dis7seg_setDigitValue(h, index+i, value >> (i*4) & 0x000F);
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}
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}
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uint8_t dis7seg_getDigitValue(dis7seg_handle_t *h, uint8_t index) {
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volatile uint8_t *reg;
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// set display index
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reg = (uint8_t *)(h->baseAddress+DISP7SEG_DISPLAY_CMD);
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*reg = CMD_GETVALUE | (index & 0x3F);
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// get value
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reg = (uint8_t *)(h->baseAddress+DISP7SEG_DISPLAY_VALUE);
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return *reg;
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}
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void dis7seg_setDigitDot(dis7seg_handle_t *h, uint8_t index, uint8_t enabled) {
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// not implemented
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}
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