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120 lines
3.5 KiB
C++
120 lines
3.5 KiB
C++
/*
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* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <iostream>
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#include <unistd.h>
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#include <stdlib.h>
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#include "my9221.h"
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using namespace upm;
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MY9221::MY9221 (uint8_t di, uint8_t dcki) {
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maa_result_t error = MAA_SUCCESS;
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maa_init();
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// init clock context
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m_clkPinCtx = maa_gpio_init(dcki);
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if (m_clkPinCtx == NULL) {
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fprintf(stderr, "Are you sure that pin%d you requested is valid on your platform?", dcki);
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exit(1);
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}
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// init data context
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m_dataPinCtx = maa_gpio_init(di);
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if (m_dataPinCtx == NULL) {
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fprintf(stderr, "Are you sure that pin%d you requested is valid on your platform?", di);
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exit(1);
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}
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// set direction (out)
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error = maa_gpio_dir(m_clkPinCtx, MAA_GPIO_OUT);
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if (error != MAA_SUCCESS) {
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maa_result_print(error);
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}
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// set direction (out)
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error = maa_gpio_dir(m_dataPinCtx, MAA_GPIO_OUT);
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if (error != MAA_SUCCESS) {
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maa_result_print(error);
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}
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}
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MY9221::~MY9221() {
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maa_result_t error = MAA_SUCCESS;
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error = maa_gpio_close (m_dataPinCtx);
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if (error != MAA_SUCCESS) {
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maa_result_print(error);
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}
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error = maa_gpio_close (m_clkPinCtx);
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if (error != MAA_SUCCESS) {
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maa_result_print(error);
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}
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}
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maa_result_t
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MY9221::setBarLevel (uint8_t level) {
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if (level > 10) {
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return MAA_ERROR_INVALID_PARAMETER;
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}
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send16bitBlock (CMDMODE);
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for(uint8_t block_idx = 0; block_idx < 12; block_idx++) {
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uint32_t state = (block_idx < level) ? BIT_HIGH : BIT_LOW;
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send16bitBlock (state);
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}
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lockData ();
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}
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maa_result_t
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MY9221::lockData () {
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maa_result_t error = MAA_SUCCESS;
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error = maa_gpio_write (m_dataPinCtx, LOW);
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usleep(100);
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for(int idx = 0; idx < 4; idx++) {
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error = maa_gpio_write (m_dataPinCtx, HIGH);
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error = maa_gpio_write (m_dataPinCtx, LOW);
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}
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}
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maa_result_t
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MY9221::send16bitBlock (short data) {
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maa_result_t error = MAA_SUCCESS;
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for (uint8_t bit_idx = 0; bit_idx < MAX_BIT_PER_BLOCK; bit_idx++) {
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uint32_t state = (data & 0x8000) ? HIGH : LOW;
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error = maa_gpio_write (m_dataPinCtx, state);
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state = maa_gpio_read (m_clkPinCtx);
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if (state) {
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state = LOW;
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} else {
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state = HIGH;
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}
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error = maa_gpio_write (m_clkPinCtx, state);
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data <<= 1;
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}
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}
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