pca9532.c

LPC1788的USBHOST的FATFS移植

/**********************************************************************
* $Id$		pca9532.c			2011-06-02
*//**
* @file		pca9532.c
* @brief	Contains all functions support for PCA9532 IC  to drive 16 LEDs
* @version	1.0
* @date		02. June. 2011
* @author	NXP MCU SW Application Team
* 
* Copyright(C) 2011, NXP Semiconductor
* All rights reserved.
*
***********************************************************************
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* products. This software is supplied "AS IS" without any warranties.
* NXP Semiconductors assumes no responsibility or liability for the
* use of the software, conveys no license or title under any patent,
* copyright, or mask work right to the product. NXP Semiconductors
* reserves the right to make changes in the software without
* notification. NXP Semiconductors also make no representation or
* warranty that such application will be suitable for the specified
* use without further testing or modification.
**********************************************************************/

#include "pca9532.h"
#include "lpc177x_8x_i2c.h"
#include "lpc177x_8x_pinsel.h"

#define BUFSIZE			(20)

//PCA9532 link to I2C0 only
#define PCA9532_I2C		I2C_0


/*********************************************************************//**
 * @brief 		Initialize Pca9532
 * @param[in]	i2cClockFreq	I2C clock frequency that Pca9532 operate
 * @return 		None
 **********************************************************************/
void Pca9532_Init(uint32_t i2cClockFreq)
{
	// Config Pin for I2C_SDA and I2C_SCL of I2C0
	// It's because the PCA9532 IC is linked to LPC177x_8x by I2C0 clearly
	PINSEL_ConfigPin (0, 27, 1);
	PINSEL_ConfigPin (0, 28, 1);

	I2C_Init(PCA9532_I2C, i2cClockFreq);

	/* Enable I2C1 operation */
	I2C_Cmd(PCA9532_I2C, ENABLE);

	return;
}

/*********************************************************************//**
 * @brief 		Close Pca9532
 * @param[in]	None
 * @return 		None
 **********************************************************************/
void Pca9532_DeInit(void)
{
	/* Enable I2C1 operation */
	I2C_Cmd(PCA9532_I2C, DISABLE);

	return;
}

/*********************************************************************//**
 * @brief 		Control led output
 * @param[in]	settings	Pointer that point to PCA configuration struct
 * @return 		Status, could be:
 * 				- PCA9532_RETFUNC_OK: success
 * 				- PCA9532_RETFUNC_FAILED_OP: fail
 **********************************************************************/
int Pca9532_LedOutputControl(pca9532_Configure_st_t* settings)
{
	uint32_t psc0 = 0, psc1 = 0, pwm0 = 0, pwm1 = 0, ls0 = 0, ls1 = 0, ls2 = 0, ls3 = 0;
	int cnt = 0;

	I2C_M_SETUP_Type i2cData;
	uint8_t i2cBuf[BUFSIZE];

	// Check if the LED level is in range. Unless set it to default
	for (cnt = 0; cnt < NUMBER_OF_ONCHIP_LEDS; cnt++)
	{
		settings->led_settings[cnt] = ((settings->led_settings[cnt] >= PCA9532_LED_MAX_LEVEL)
											||(settings->led_settings[cnt] < 0)) ?
											PCA9532_LED_LEVEL_DEFAULT : settings->led_settings[cnt];
	}

	if (settings->led_blinking_freq_0 == 0)
	{
		psc0 = 0;
	}
	else
	{
		switch(settings->led_freq0_unit)
		{
			default:

			case PCA9532_CALCULATING_TIME_IN_SECOND:
				psc0 = (settings->led_blinking_freq_0 * PCA9532_PRESCALER_FACTOR) - 1;
				break;

			case PCA9532_CALCULATING_TIME_IN_HERTZ:
				psc0 = (uint32_t) ((PCA9532_PRESCALER_FACTOR / settings->led_blinking_freq_0) - 1);
				break;
		}
	}

	pwm0 = settings->duty_cycle_0 * PCA9532_PWM_FACTOR / PERCENT_FACTOR;

	if (settings->led_blinking_freq_0 == 0)
	{
		psc1 = 0;
	}
	else
	{
		switch(settings->led_freq1_unit)
		{
			default:

			case PCA9532_CALCULATING_TIME_IN_SECOND:
				psc1 = (settings->led_blinking_freq_1 * PCA9532_PRESCALER_FACTOR) - 1;
				break;

			case PCA9532_CALCULATING_TIME_IN_HERTZ:
				psc1 = (uint32_t) ((PCA9532_PRESCALER_FACTOR / settings->led_blinking_freq_1) - 1);
				break;
		}
	}

	pwm1 = settings->duty_cycle_1 * PCA9532_PWM_FACTOR / PERCENT_FACTOR;

	ls0 = 0;
	ls1 = 0;
	ls2 = 0;
	ls3 = 0;

	for(cnt = 0; cnt < 4; cnt++)
	{
		ls0 |= (settings->led_settings[cnt] & PCA9532_LED_LEVEL_MASK) << (cnt * PCA9532_LED_LEVEL_NUM_BITS);

		ls1 |= (settings->led_settings[cnt + 4] & PCA9532_LED_LEVEL_MASK) << (cnt * PCA9532_LED_LEVEL_NUM_BITS);

		ls2 |= (settings->led_settings[cnt + 8] & PCA9532_LED_LEVEL_MASK) << (cnt * PCA9532_LED_LEVEL_NUM_BITS);

		ls3 |= (settings->led_settings[cnt + 12] & PCA9532_LED_LEVEL_MASK) << (cnt * PCA9532_LED_LEVEL_NUM_BITS);
	}

	i2cBuf[0] = 0x12;						/* Control Register - start with Frequency Prescale 0 */
	i2cBuf[1] = psc0 & BYTE_BITMASK;		/* Value of Frequency Prescale 0 */
	i2cBuf[2] = pwm0 & BYTE_BITMASK;		/* Value of PWM Register 0 */
	i2cBuf[3] = psc1 & BYTE_BITMASK;		/* Value of Frequency Prescale 1 */
	i2cBuf[4] = pwm1 & BYTE_BITMASK;		/* Value of PWM Register 1 */
	i2cBuf[5] = ls0 & BYTE_BITMASK;			/* Value of LED Selector 0 */
	i2cBuf[6] = ls1 & BYTE_BITMASK;			/* Value of LED Selector 1 */
	i2cBuf[7] = ls2 & BYTE_BITMASK;			/* Value of LED Selector 2 */
	i2cBuf[8] = ls3 & BYTE_BITMASK;			/* Value of LED Selector 3 */


	i2cData.sl_addr7bit = PCA9532_I2CADDR >> 1;
	i2cData.tx_data = i2cBuf;
	i2cData.tx_length = 9;
	i2cData.rx_data = NULL;
	i2cData.rx_length = 0;
	i2cData.retransmissions_max = 3;

	if (I2C_MasterTransferData(PCA9532_I2C, &i2cData, I2C_TRANSFER_POLLING) == SUCCESS)
	{
		return PCA9532_RETFUNC_OK;
	}
	else
	{
		return PCA9532_RETFUNC_FAILED_OP;
	}

}

/*********************************************************************************
**                            End Of File
*********************************************************************************/