Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_ONSEMI/TARGET_NCS36510/port_api.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /**
<> 144:ef7eb2e8f9f7 2 ******************************************************************************
<> 144:ef7eb2e8f9f7 3 * @file port_api.c
<> 144:ef7eb2e8f9f7 4 * @brief Implementation of a port API
<> 144:ef7eb2e8f9f7 5 * @internal
<> 144:ef7eb2e8f9f7 6 * @author ON Semiconductor
<> 144:ef7eb2e8f9f7 7 * $Rev:
<> 144:ef7eb2e8f9f7 8 * $Date:
<> 144:ef7eb2e8f9f7 9 ******************************************************************************
<> 144:ef7eb2e8f9f7 10 * @copyright (c) 2012 ON Semiconductor. All rights reserved.
<> 144:ef7eb2e8f9f7 11 * ON Semiconductor is supplying this software for use with ON Semiconductor
<> 144:ef7eb2e8f9f7 12 * processor based microcontrollers only.
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
<> 144:ef7eb2e8f9f7 15 * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
<> 144:ef7eb2e8f9f7 16 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
<> 144:ef7eb2e8f9f7 17 * ON SEMICONDUCTOR SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL,
<> 144:ef7eb2e8f9f7 18 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
<> 144:ef7eb2e8f9f7 19 */
<> 144:ef7eb2e8f9f7 20 #include "gpio.h"
<> 144:ef7eb2e8f9f7 21 #include "port_api.h"
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 #if DEVICE_PORTIN || DEVICE_PORTOUT
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 /** Get the pin name from the port's pin number
<> 144:ef7eb2e8f9f7 26 *
<> 144:ef7eb2e8f9f7 27 * @param port The port name
<> 144:ef7eb2e8f9f7 28 * @param pin_n The pin number within the specified port
<> 144:ef7eb2e8f9f7 29 * @return The pin name for the port's pin number
<> 144:ef7eb2e8f9f7 30 */
<> 144:ef7eb2e8f9f7 31 PinName port_pin(PortName port, int pin_n)
<> 144:ef7eb2e8f9f7 32 {
<> 144:ef7eb2e8f9f7 33 return((PinName)(pin_n));
<> 144:ef7eb2e8f9f7 34 }
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 /** Initilize the port
<> 144:ef7eb2e8f9f7 37 *
<> 144:ef7eb2e8f9f7 38 * @param obj The port object to initialize
<> 144:ef7eb2e8f9f7 39 * @param port The port name
<> 144:ef7eb2e8f9f7 40 * @param mask The bitmask to identify which bits in the port should be included (0 - ignore)
<> 144:ef7eb2e8f9f7 41 * @param dir The port direction
<> 144:ef7eb2e8f9f7 42 */
<> 144:ef7eb2e8f9f7 43 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
<> 144:ef7eb2e8f9f7 44 {
<> 144:ef7eb2e8f9f7 45 uint8_t i;
<> 144:ef7eb2e8f9f7 46 PinName pin;
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 /* Store the port mask in obj */
<> 144:ef7eb2e8f9f7 49 obj->mask = mask;
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 /* Store the port name in obj */
<> 144:ef7eb2e8f9f7 52 obj->port = port;
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 /* Store GPIO base address */
<> 144:ef7eb2e8f9f7 55 obj->GPIOMEMBASE = GPIOREG;
<> 144:ef7eb2e8f9f7 56
<> 144:ef7eb2e8f9f7 57 for (i=0; i<NUMBER_OF_GPIO; i++) {
<> 144:ef7eb2e8f9f7 58 /* check for valid pin */
<> 144:ef7eb2e8f9f7 59 if (obj->mask & (1<<i)) {
<> 144:ef7eb2e8f9f7 60
<> 144:ef7eb2e8f9f7 61 /* Gpio numbers start from DIO#0 to #17, so can pass in "i" */
<> 144:ef7eb2e8f9f7 62 pin = port_pin(obj->port, i);
<> 144:ef7eb2e8f9f7 63
<> 144:ef7eb2e8f9f7 64 /* Set the pin as GPIO */
<> 144:ef7eb2e8f9f7 65 gpio_set(pin);
<> 144:ef7eb2e8f9f7 66 }
<> 144:ef7eb2e8f9f7 67 }
<> 144:ef7eb2e8f9f7 68
<> 144:ef7eb2e8f9f7 69 /* Call function to set pin direction */
<> 144:ef7eb2e8f9f7 70 port_dir(obj, dir);
<> 144:ef7eb2e8f9f7 71 }
<> 144:ef7eb2e8f9f7 72
<> 144:ef7eb2e8f9f7 73 /** Set the input port mode
<> 144:ef7eb2e8f9f7 74 *
<> 144:ef7eb2e8f9f7 75 * @param obj The port object
<> 144:ef7eb2e8f9f7 76 * @param mode THe port mode to be set
<> 144:ef7eb2e8f9f7 77 */
<> 144:ef7eb2e8f9f7 78 void port_mode(port_t *obj, PinMode mode)
<> 144:ef7eb2e8f9f7 79 {
<> 144:ef7eb2e8f9f7 80 uint8_t i = 0;
<> 144:ef7eb2e8f9f7 81 PinName pin;
<> 144:ef7eb2e8f9f7 82
<> 144:ef7eb2e8f9f7 83 /* For each pin in the mask, set the mode to that defined in "mode" parameter */
<> 144:ef7eb2e8f9f7 84 for (i=0; i < NUMBER_OF_GPIO; i++) {
<> 144:ef7eb2e8f9f7 85 /* check for valid pin */
<> 144:ef7eb2e8f9f7 86 if (obj->mask & (1<<i)) {
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 /* get the pin name */
<> 144:ef7eb2e8f9f7 89 pin = port_pin(obj->port, i);
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 /* Set the mode for the pin */
<> 144:ef7eb2e8f9f7 92 pin_mode(pin, mode);
<> 144:ef7eb2e8f9f7 93 }
<> 144:ef7eb2e8f9f7 94 }
<> 144:ef7eb2e8f9f7 95 }
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97 /** Set port direction (in/out)
<> 144:ef7eb2e8f9f7 98 *
<> 144:ef7eb2e8f9f7 99 * @param obj The port object
<> 144:ef7eb2e8f9f7 100 * @param dir The port direction to be set
<> 144:ef7eb2e8f9f7 101 */
<> 144:ef7eb2e8f9f7 102 void port_dir(port_t *obj, PinDirection dir)
<> 144:ef7eb2e8f9f7 103 {
<> 144:ef7eb2e8f9f7 104 /* Enable the GPIO clock */
<> 144:ef7eb2e8f9f7 105 CLOCK_ENABLE(CLOCK_GPIO);
<> 144:ef7eb2e8f9f7 106
<> 144:ef7eb2e8f9f7 107 if (dir == PIN_INPUT) {
<> 144:ef7eb2e8f9f7 108 obj->GPIOMEMBASE->W_IN = obj->mask;
<> 144:ef7eb2e8f9f7 109 } else if (dir == PIN_OUTPUT) {
<> 144:ef7eb2e8f9f7 110 obj->GPIOMEMBASE->W_OUT = obj->mask;
<> 144:ef7eb2e8f9f7 111 }
<> 144:ef7eb2e8f9f7 112
<> 144:ef7eb2e8f9f7 113 /* Disable the GPIO clock */
<> 144:ef7eb2e8f9f7 114 CLOCK_DISABLE(CLOCK_GPIO);
<> 144:ef7eb2e8f9f7 115 }
<> 144:ef7eb2e8f9f7 116
<> 144:ef7eb2e8f9f7 117 /** Write value to the port
<> 144:ef7eb2e8f9f7 118 *
<> 144:ef7eb2e8f9f7 119 * @param obj The port object
<> 144:ef7eb2e8f9f7 120 * @param value The value to be set
<> 144:ef7eb2e8f9f7 121 */
<> 144:ef7eb2e8f9f7 122 void port_write(port_t *obj, int value)
<> 144:ef7eb2e8f9f7 123 {
<> 144:ef7eb2e8f9f7 124 /* Enable the GPIO clock */
<> 144:ef7eb2e8f9f7 125 CLOCK_ENABLE(CLOCK_GPIO);
<> 144:ef7eb2e8f9f7 126
<> 144:ef7eb2e8f9f7 127 obj->GPIOMEMBASE->R_STATE_W_SET = value;//(obj->mask & value);
<> 144:ef7eb2e8f9f7 128 obj->GPIOMEMBASE->R_IRQ_W_CLEAR = ~value;//(obj->mask ^ value);
<> 144:ef7eb2e8f9f7 129
<> 144:ef7eb2e8f9f7 130 /* Disable the GPIO clock */
<> 144:ef7eb2e8f9f7 131 CLOCK_DISABLE(CLOCK_GPIO);
<> 144:ef7eb2e8f9f7 132 }
<> 144:ef7eb2e8f9f7 133
<> 144:ef7eb2e8f9f7 134 /** Read the current value on the port
<> 144:ef7eb2e8f9f7 135 *
<> 144:ef7eb2e8f9f7 136 * @param obj The port object
<> 144:ef7eb2e8f9f7 137 * @return An integer with each bit corresponding to an associated port pin setting
<> 144:ef7eb2e8f9f7 138 */
<> 144:ef7eb2e8f9f7 139 int port_read(port_t *obj)
<> 144:ef7eb2e8f9f7 140 {
<> 144:ef7eb2e8f9f7 141 int gpio_level = 0;
<> 144:ef7eb2e8f9f7 142
<> 144:ef7eb2e8f9f7 143 /* Enable the GPIO clock */
<> 144:ef7eb2e8f9f7 144 CLOCK_ENABLE(CLOCK_GPIO);
<> 144:ef7eb2e8f9f7 145
<> 144:ef7eb2e8f9f7 146 gpio_level = obj->GPIOMEMBASE->R_STATE_W_SET;
<> 144:ef7eb2e8f9f7 147
<> 144:ef7eb2e8f9f7 148 /* Disable the GPIO clock */
<> 144:ef7eb2e8f9f7 149 CLOCK_DISABLE(CLOCK_GPIO);
<> 144:ef7eb2e8f9f7 150
<> 144:ef7eb2e8f9f7 151 return(gpio_level);
<> 144:ef7eb2e8f9f7 152 }
<> 144:ef7eb2e8f9f7 153
<> 144:ef7eb2e8f9f7 154 #endif