Diff: targets/hal/TARGET_NXP/TARGET_LPC43XX/analogin_api.c

Revision:

144:ef7eb2e8f9f7

Parent:

0:9b334a45a8ff

Child:

148:21d94c44109e

--- a/targets/hal/TARGET_NXP/TARGET_LPC43XX/analogin_api.c	Tue Aug 02 14:07:36 2016 +0000
+++ b/targets/hal/TARGET_NXP/TARGET_LPC43XX/analogin_api.c	Fri Sep 02 15:07:44 2016 +0100
@@ -1,134 +1,134 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * Ported to NXP LPC43XX by Micromint USA <support@micromint.com>
- */
-#include "mbed_assert.h"
-#include "analogin_api.h"
-#include "cmsis.h"
-#include "pinmap.h"
-#include "mbed_error.h"
-#include "gpio_api.h"
-
-#define ANALOGIN_MEDIAN_FILTER      1
-
-static inline int div_round_up(int x, int y) {
-  return (x + (y - 1)) / y;
-}
-
-static const PinMap PinMap_ADC[] = {
-    {P4_3,  ADC0_0, 0},
-    {P4_1,  ADC0_1, 0},
-    {PF_8,  ADC0_2, 0},
-    {P7_5,  ADC0_3, 0},
-    {P7_4,  ADC0_4, 0},
-    {PF_10, ADC0_5, 0},
-    {PB_6,  ADC0_6, 0},
-    {PC_3,  ADC1_0, 0},
-    {PC_0,  ADC1_1, 0},
-    {PF_9,  ADC1_2, 0},
-    {PF_6,  ADC1_3, 0},
-    {PF_5,  ADC1_4, 0},
-    {PF_11, ADC1_5, 0},
-    {P7_7,  ADC1_6, 0},
-    {PF_7,  ADC1_7, 0},
-    {NC,    NC,     0   }
-};
-
-void analogin_init(analogin_t *obj, PinName pin) {
-    ADCName name;
-
-    name = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
-    MBED_ASSERT(obj->adc != (LPC_ADC_T *)NC);
-
-    // Set ADC register, number and channel
-    obj->num = (name >> ADC0_7) ? 1 : 0;
-    obj->ch = name % (ADC0_7 + 1);
-    obj->adc = (LPC_ADC_T *) (obj->num > 0) ? LPC_ADC1 : LPC_ADC0;
-
-    // Reset pin function to GPIO
-    gpio_set(pin);
-    // Select ADC on analog function select register in SCU
-    LPC_SCU->ENAIO[obj->num] |= (1 << obj->ch);
-    
-    // Calculate minimum clock divider
-    //  clkdiv = divider - 1
-    uint32_t PCLK = SystemCoreClock;
-    uint32_t adcRate = 400000;
-    uint32_t clkdiv = div_round_up(PCLK, adcRate) - 1;
-    
-    // Set the generic software-controlled ADC settings
-    obj->adc->CR = (0 << 0)      // SEL: 0 = no channels selected
-                  | (clkdiv << 8) // CLKDIV:
-                  | (0 << 16)     // BURST: 0 = software control
-                  | (1 << 21)     // PDN: 1 = operational
-                  | (0 << 24)     // START: 0 = no start
-                  | (0 << 27);    // EDGE: not applicable
-}
-
-static inline uint32_t adc_read(analogin_t *obj) {
-    uint32_t temp;
-    uint8_t channel = obj->ch;
-    LPC_ADC_T *pADC = obj->adc;
-
-    // Select the appropriate channel and start conversion
-    pADC->CR |= ADC_CR_CH_SEL(channel);
-    temp = pADC->CR & ~ADC_CR_START_MASK;
-    pADC->CR = temp | (ADC_CR_START_MODE_SEL(ADC_START_NOW));
-
-    // Wait for DONE bit and read data
-    while (!(pADC->STAT & ADC_CR_CH_SEL(channel)));
-    temp = pADC->DR[channel];
-
-    // Deselect channel and return result
-    pADC->CR &= ~ADC_CR_START_MASK;
-    pADC->CR &= ~ADC_CR_CH_SEL(channel);
-    return ADC_DR_RESULT(temp);
-}
-
-static inline void order(uint32_t *a, uint32_t *b) {
-    if (*a > *b) {
-        uint32_t t = *a;
-        *a = *b;
-        *b = t;
-    }
-}
-
-static inline uint32_t adc_read_u32(analogin_t *obj) {
-    uint32_t value;
-#if ANALOGIN_MEDIAN_FILTER
-    uint32_t v1 = adc_read(obj);
-    uint32_t v2 = adc_read(obj);
-    uint32_t v3 = adc_read(obj);
-    order(&v1, &v2);
-    order(&v2, &v3);
-    order(&v1, &v2);
-    value = v2;
-#else
-    value = adc_read(obj);
-#endif
-    return value;
-}
-
-uint16_t analogin_read_u16(analogin_t *obj) {
-    uint32_t value = adc_read_u32(obj);
-
-    return (value << 6) | ((value >> 4) & 0x003F); // 10 bit
-}
-
-float analogin_read(analogin_t *obj) {
-    uint32_t value = adc_read_u32(obj);
-    return (float)value * (1.0f / (float)ADC_RANGE);
-}
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Ported to NXP LPC43XX by Micromint USA <support@micromint.com>
+ */
+#include "mbed_assert.h"
+#include "analogin_api.h"
+#include "cmsis.h"
+#include "pinmap.h"
+#include "mbed_error.h"
+#include "gpio_api.h"
+
+#define ANALOGIN_MEDIAN_FILTER      1
+
+static inline int div_round_up(int x, int y) {
+  return (x + (y - 1)) / y;
+}
+
+static const PinMap PinMap_ADC[] = {
+    {P4_3,  ADC0_0, 0},
+    {P4_1,  ADC0_1, 0},
+    {PF_8,  ADC0_2, 0},
+    {P7_5,  ADC0_3, 0},
+    {P7_4,  ADC0_4, 0},
+    {PF_10, ADC0_5, 0},
+    {PB_6,  ADC0_6, 0},
+    {PC_3,  ADC1_0, 0},
+    {PC_0,  ADC1_1, 0},
+    {PF_9,  ADC1_2, 0},
+    {PF_6,  ADC1_3, 0},
+    {PF_5,  ADC1_4, 0},
+    {PF_11, ADC1_5, 0},
+    {P7_7,  ADC1_6, 0},
+    {PF_7,  ADC1_7, 0},
+    {NC,    NC,     0   }
+};
+
+void analogin_init(analogin_t *obj, PinName pin) {
+    ADCName name;
+
+    name = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
+    MBED_ASSERT(obj->adc != (LPC_ADC_T *)NC);
+
+    // Set ADC register, number and channel
+    obj->num = (name >> ADC0_7) ? 1 : 0;
+    obj->ch = name % (ADC0_7 + 1);
+    obj->adc = (LPC_ADC_T *) (obj->num > 0) ? LPC_ADC1 : LPC_ADC0;
+
+    // Reset pin function to GPIO
+    gpio_set(pin);
+    // Select ADC on analog function select register in SCU
+    LPC_SCU->ENAIO[obj->num] |= (1 << obj->ch);
+    
+    // Calculate minimum clock divider
+    //  clkdiv = divider - 1
+    uint32_t PCLK = SystemCoreClock;
+    uint32_t adcRate = 400000;
+    uint32_t clkdiv = div_round_up(PCLK, adcRate) - 1;
+    
+    // Set the generic software-controlled ADC settings
+    obj->adc->CR = (0 << 0)      // SEL: 0 = no channels selected
+                  | (clkdiv << 8) // CLKDIV:
+                  | (0 << 16)     // BURST: 0 = software control
+                  | (1 << 21)     // PDN: 1 = operational
+                  | (0 << 24)     // START: 0 = no start
+                  | (0 << 27);    // EDGE: not applicable
+}
+
+static inline uint32_t adc_read(analogin_t *obj) {
+    uint32_t temp;
+    uint8_t channel = obj->ch;
+    LPC_ADC_T *pADC = obj->adc;
+
+    // Select the appropriate channel and start conversion
+    pADC->CR |= ADC_CR_CH_SEL(channel);
+    temp = pADC->CR & ~ADC_CR_START_MASK;
+    pADC->CR = temp | (ADC_CR_START_MODE_SEL(ADC_START_NOW));
+
+    // Wait for DONE bit and read data
+    while (!(pADC->STAT & ADC_CR_CH_SEL(channel)));
+    temp = pADC->DR[channel];
+
+    // Deselect channel and return result
+    pADC->CR &= ~ADC_CR_START_MASK;
+    pADC->CR &= ~ADC_CR_CH_SEL(channel);
+    return ADC_DR_RESULT(temp);
+}
+
+static inline void order(uint32_t *a, uint32_t *b) {
+    if (*a > *b) {
+        uint32_t t = *a;
+        *a = *b;
+        *b = t;
+    }
+}
+
+static inline uint32_t adc_read_u32(analogin_t *obj) {
+    uint32_t value;
+#if ANALOGIN_MEDIAN_FILTER
+    uint32_t v1 = adc_read(obj);
+    uint32_t v2 = adc_read(obj);
+    uint32_t v3 = adc_read(obj);
+    order(&v1, &v2);
+    order(&v2, &v3);
+    order(&v1, &v2);
+    value = v2;
+#else
+    value = adc_read(obj);
+#endif
+    return value;
+}
+
+uint16_t analogin_read_u16(analogin_t *obj) {
+    uint32_t value = adc_read_u32(obj);
+
+    return (value << 6) | ((value >> 4) & 0x003F); // 10 bit
+}
+
+float analogin_read(analogin_t *obj) {
+    uint32_t value = adc_read_u32(obj);
+    return (float)value * (1.0f / (float)ADC_RANGE);
+}