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-rwxr-xr-xtinyusb/hw/bsp/ea4357/pca9532.c352
1 files changed, 352 insertions, 0 deletions
diff --git a/tinyusb/hw/bsp/ea4357/pca9532.c b/tinyusb/hw/bsp/ea4357/pca9532.c
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+/*****************************************************************************
+ *
+ * Copyright(C) 2011, Embedded Artists AB
+ * 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.
+ * Embedded Artists AB 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. Embedded Artists AB
+ * reserves the right to make changes in the software without
+ * notification. Embedded Artists AB also make no representation or
+ * warranty that such application will be suitable for the specified
+ * use without further testing or modification.
+ *****************************************************************************/
+
+/*
+ * NOTE: I2C must have been initialized before calling any functions in this
+ * file.
+ */
+
+/******************************************************************************
+ * Includes
+ *****************************************************************************/
+
+//#include "board.h"
+#include "chip.h"
+
+#include "pca9532.h"
+
+/******************************************************************************
+ * Defines and typedefs
+ *****************************************************************************/
+
+#define I2C_PORT (LPC_I2C0)
+
+#define LS_MODE_ON 0x01
+#define LS_MODE_BLINK0 0x02
+#define LS_MODE_BLINK1 0x03
+
+/******************************************************************************
+ * External global variables
+ *****************************************************************************/
+
+
+/******************************************************************************
+ * Local variables
+ *****************************************************************************/
+
+static uint16_t blink0Shadow = 0;
+static uint16_t blink1Shadow = 0;
+static uint16_t ledStateShadow = 0;
+
+/******************************************************************************
+ * Local Functions
+ *****************************************************************************/
+
+static Status I2CWrite(uint32_t addr, uint8_t* buf, uint32_t len)
+{
+ I2CM_XFER_T i2cData;
+
+ i2cData.slaveAddr = addr;
+ i2cData.options = 0;
+ i2cData.status = 0;
+ i2cData.txBuff = buf;
+ i2cData.txSz = len;
+ i2cData.rxBuff = NULL;
+ i2cData.rxSz = 0;
+
+ if (Chip_I2CM_XferBlocking(LPC_I2C0, &i2cData) == 0) {
+ return ERROR;
+ }
+ return SUCCESS;
+}
+
+static Status I2CRead(uint32_t addr, uint8_t* buf, uint32_t len)
+{
+ I2CM_XFER_T i2cData;
+
+ i2cData.slaveAddr = addr;
+ i2cData.options = 0;
+ i2cData.status = 0;
+ i2cData.txBuff = NULL;
+ i2cData.txSz = 0;
+ i2cData.rxBuff = buf;
+ i2cData.rxSz = len;
+
+ if (Chip_I2CM_XferBlocking(LPC_I2C0, &i2cData) == 0) {
+ return ERROR;
+ }
+ return SUCCESS;
+}
+
+static void setLsStates(uint16_t states, uint8_t* ls, uint8_t mode)
+{
+#define IS_LED_SET(bit, x) ( ( ((x) & (bit)) != 0 ) ? 1 : 0 )
+
+ int i = 0;
+
+ for (i = 0; i < 4; i++) {
+
+ ls[i] |= ( (IS_LED_SET(0x0001, states)*mode << 0)
+ | (IS_LED_SET(0x0002, states)*mode << 2)
+ | (IS_LED_SET(0x0004, states)*mode << 4)
+ | (IS_LED_SET(0x0008, states)*mode << 6) );
+
+ states >>= 4;
+ }
+}
+
+static void setLeds(void)
+{
+ uint8_t buf[5];
+ uint8_t ls[4] = {0,0,0,0};
+ uint16_t states = ledStateShadow;
+
+ /* LEDs in On/Off state */
+ setLsStates(states, ls, LS_MODE_ON);
+
+ /* set the LEDs that should blink */
+ setLsStates(blink0Shadow, ls, LS_MODE_BLINK0);
+ setLsStates(blink1Shadow, ls, LS_MODE_BLINK1);
+
+
+ buf[0] = PCA9532_LS0 | PCA9532_AUTO_INC;
+ buf[1] = ls[0];
+ buf[2] = ls[1];
+ buf[3] = ls[2];
+ buf[4] = ls[3];
+ I2CWrite(PCA9532_I2C_ADDR, buf, 5);
+}
+
+/******************************************************************************
+ * Public Functions
+ *****************************************************************************/
+
+/******************************************************************************
+ *
+ * Description:
+ * Initialize the PCA9532 Device
+ *
+ *****************************************************************************/
+void pca9532_init (void)
+{
+ /* nothing to initialize */
+}
+
+/******************************************************************************
+ *
+ * Description:
+ * Get the LED states
+ *
+ * Params:
+ * [in] shadow - TRUE if the states should be retrieved from the shadow
+ * variables. The shadow variable are updated when any
+ * of setLeds, setBlink0Leds and/or setBlink1Leds are
+ * called.
+ *
+ * FALSE if the state should be retrieved from the PCA9532
+ * device. A blinkin LED may be reported as on or off
+ * depending on the state when calling the function.
+ *
+ * Returns:
+ * A mask where a 1 indicates that a LED is on (or blinking).
+ *
+ *****************************************************************************/
+uint16_t pca9532_getLedState (uint32_t shadow)
+{
+ uint8_t buf[2];
+ uint16_t ret = 0;
+
+ if (shadow) {
+ /* a blink LED is reported as on*/
+ ret = (ledStateShadow | blink0Shadow | blink1Shadow);
+ }
+ else {
+
+ /*
+ * A blinking LED may be reported as on or off depending on
+ * its state when reading the Input register.
+ */
+
+ buf[0] = PCA9532_INPUT0;
+ I2CWrite(PCA9532_I2C_ADDR, buf, 1);
+
+ I2CRead(PCA9532_I2C_ADDR, buf, 1);
+ ret = buf[0];
+
+
+ buf[0] = PCA9532_INPUT1;
+ I2CWrite(PCA9532_I2C_ADDR, buf, 1);
+
+ I2CRead(PCA9532_I2C_ADDR, buf, 1);
+ ret |= (buf[0] << 8);
+
+
+ /* invert since LEDs are active low */
+ ret = ((~ret) & 0xFFFF);
+ }
+
+ return (ret & ~PCA9532_NOT_USED);
+}
+
+
+/******************************************************************************
+ *
+ * Description:
+ * Set LED states (on or off).
+ *
+ * Params:
+ * [in] ledOnMask - The LEDs that should be turned on. This mask has
+ * priority over ledOffMask
+ * [in] ledOffMask - The LEDs that should be turned off.
+ *
+ *****************************************************************************/
+void pca9532_setLeds (uint16_t ledOnMask, uint16_t ledOffMask)
+{
+ /* turn off leds */
+ ledStateShadow &= (~(ledOffMask) & 0xffff);
+
+ /* ledOnMask has priority over ledOffMask */
+ ledStateShadow |= ledOnMask;
+
+ /* turn off blinking */
+ blink0Shadow &= (~(ledOffMask) & 0xffff);
+ blink1Shadow &= (~(ledOffMask) & 0xffff);
+
+ setLeds();
+}
+
+/******************************************************************************
+ *
+ * Description:
+ * Set the blink period for PWM0. Valid values are 0 - 255 where 0
+ * means 152 Hz and 255 means 0.59 Hz. A value of 151 means 1 Hz.
+ *
+ * Params:
+ * [in] period - the period for pwm0
+ *
+ *****************************************************************************/
+void pca9532_setBlink0Period(uint8_t period)
+{
+ uint8_t buf[2];
+
+ buf[0] = PCA9532_PSC0;
+ buf[1] = period;
+ I2CWrite(PCA9532_I2C_ADDR, buf, 2);
+}
+
+/******************************************************************************
+ *
+ * Description:
+ * Set the duty cycle for PWM0. Valid values are 0 - 100. 25 means the LED
+ * is on 25% of the period.
+ *
+ * Params:
+ * [in] duty - duty cycle
+ *
+ *****************************************************************************/
+void pca9532_setBlink0Duty(uint8_t duty)
+{
+ uint8_t buf[2];
+ uint32_t tmp = duty;
+ if (tmp > 100) {
+ tmp = 100;
+ }
+
+ tmp = (256 * tmp)/100;
+
+ buf[0] = PCA9532_PWM0;
+ buf[1] = tmp;
+ I2CWrite(PCA9532_I2C_ADDR, buf, 2);
+}
+
+/******************************************************************************
+ *
+ * Description:
+ * Set the LEDs that should blink with rate and duty cycle from PWM0.
+ * Blinking is turned off with pca9532_setLeds.
+ *
+ * Params:
+ * [in] ledMask - LEDs that should blink.
+ *
+ *****************************************************************************/
+void pca9532_setBlink0Leds(uint16_t ledMask)
+{
+ blink0Shadow |= ledMask;
+ setLeds();
+}
+
+/******************************************************************************
+ *
+ * Description:
+ * Set the blink period for PWM1. Valid values are 0 - 255 where 0
+ * means 152 Hz and 255 means 0.59 Hz. A value of 151 means 1 Hz.
+ *
+ * Params:
+ * [in] period - The period for PWM1
+ *
+ *****************************************************************************/
+void pca9532_setBlink1Period(uint8_t period)
+{
+ uint8_t buf[2];
+
+ buf[0] = PCA9532_PSC1;
+ buf[1] = period;
+ I2CWrite(PCA9532_I2C_ADDR, buf, 2);
+}
+
+/******************************************************************************
+ *
+ * Description:
+ * Set the duty cycle for PWM1. Valid values are 0 - 100. 25 means the LED
+ * is on 25% of the period.
+ *
+ * Params:
+ * [in] duty - duty cycle.
+ *
+ *****************************************************************************/
+void pca9532_setBlink1Duty(uint8_t duty)
+{
+ uint8_t buf[2];
+
+ uint32_t tmp = duty;
+ if (tmp > 100) {
+ tmp = 100;
+ }
+
+ tmp = (256 * tmp)/100;
+
+ buf[0] = PCA9532_PWM1;
+ buf[1] = tmp;
+ I2CWrite(PCA9532_I2C_ADDR, buf, 2);
+}
+
+/******************************************************************************
+ *
+ * Description:
+ * Set the LEDs that should blink with rate and duty cycle from PWM1.
+ * Blinking is turned off with pca9532_setLeds.
+ *
+ * Params:
+ * [in] ledMask - LEDs that should blink.
+ *
+ *****************************************************************************/
+void pca9532_setBlink1Leds(uint16_t ledMask)
+{
+ blink1Shadow |= ledMask;
+ setLeds();
+}
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