Robert Pope
Attempting to create an open source, very simple (basically bluetooth notification light to start) smartwatch around the nRF51822.
Dependencies: BLE_API mbed nRF51822
The main branch of code for the simpleWatch project
Revision 0:3e9f9b3ed7c8, committed 2016-05-11
- Comitter:
- rjpope42
- Date:
- Wed May 11 18:29:00 2016 +0000
- Commit message:
- Committing a PWM attempt as version 1.0
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/BLE_API.lib Wed May 11 18:29:00 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#a097e1be76f4
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/battery.h Wed May 11 18:29:00 2016 +0000
@@ -0,0 +1,43 @@
+
+
+#ifndef __BATTERY_H__
+#define __BATTERY_H__
+
+#include "mbed.h"
+
+class Battery {
+public:
+ Battery(PinName pin) {
+ uint32_t n = (uint32_t) pin;
+ channel = 1 << (1 + n);
+ }
+
+ float read() {
+ uint32_t pre_enable_register = NRF_ADC->ENABLE;
+ uint32_t pre_config_register = NRF_ADC->CONFIG;
+
+
+ NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Enabled;
+ NRF_ADC->CONFIG = (ADC_CONFIG_RES_10bit << ADC_CONFIG_RES_Pos) |
+ (ADC_CONFIG_INPSEL_AnalogInputNoPrescaling << ADC_CONFIG_INPSEL_Pos) |
+ (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) |
+ (channel << ADC_CONFIG_PSEL_Pos) |
+ (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos);
+
+ NRF_ADC->TASKS_START = 1;
+ while (((NRF_ADC->BUSY & ADC_BUSY_BUSY_Msk) >> ADC_BUSY_BUSY_Pos) == ADC_BUSY_BUSY_Busy) {
+ }
+
+ uint16_t value = NRF_ADC->RESULT;
+
+ NRF_ADC->ENABLE = pre_enable_register;
+ NRF_ADC->CONFIG = pre_config_register;
+
+ return (float)value * (1.0f / (float)0x3FF) * 1.2 * 12.2 / 2.2;
+ }
+
+private:
+ uint32_t channel;
+};
+
+#endif // __BATTERY_H__
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed May 11 18:29:00 2016 +0000
@@ -0,0 +1,164 @@
+
+#include "mbed.h"
+#include "nrf51.h"
+#include "nrf51_bitfields.h"
+#include <string>
+
+#include "BLE.h"
+#include "DFUService.h"
+#include "UARTService.h"
+
+#define LED_GREEN p21
+#define LED_RED p22
+#define LED_BLUE p23
+#define BUTTON_PIN p17
+#define BATTERY_PIN p1
+
+#define UART_TX p9
+#define UART_RX p11
+#define UART_CTS p8
+#define UART_RTS p10
+
+InterruptIn button(BUTTON_PIN);
+AnalogIn battery(BATTERY_PIN);
+
+
+
+int read_none_count = 0;
+
+BLEDevice ble;
+UARTService *uartServicePtr;
+
+volatile bool bleIsConnected = false;
+volatile uint8_t tick_event = 0;
+
+
+
+void connectionCallback(const Gap::ConnectionCallbackParams_t *params)
+{
+ bleIsConnected = true;
+}
+
+void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *cbParams)
+{
+ ble.startAdvertising();
+ bleIsConnected = false;
+}
+
+void detect(void)
+{
+ //LOG("Button pressed\n");
+ //blue = !blue;
+}
+
+void led_init(void)
+{
+
+//set LED pins to digital output
+NRF_GPIO->PIN_CNF[LED_BLUE] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
+ | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
+ | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
+ | (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos)
+ | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+
+NRF_GPIO->PIN_CNF[LED_GREEN] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
+ | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
+ | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
+ | (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos)
+ | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+
+NRF_GPIO->PIN_CNF[LED_RED] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
+ | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
+ | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
+ | (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos)
+ | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+// NRF_GPIO - #define NRF_GPIO ((NRF_GPIO_Type *) NRF_GPIO_BASE)
+// NRF_GPIO_Type - struct containing possible settings (DIR, INPUT, PULL, DRIVE, SENSE, as well as PIN_CNF[] (configuration array for all 32 outputs)
+// NRF_GPIO_BASE - #define NRF_GPIO_BASE 0x50000000UL //base register address for GPIO settings
+// -> just a way of accessing PIN_CNF[pin_we_want_to_mess_with], object oriented programming stuff
+// GPIO_PIN_CNF_SENSE_Disabled //the appropriate binary value to set sense as disabled
+// << //bit shift
+// GPIO_PIN_CNF_SENSE_pos //position that the value of GPIO_PIN_CNF_SENSE_Disabled should be placed at
+// | //OR all of these values together to set the register
+}
+
+
+int main(void)
+{
+
+ led_init();
+
+ //Turn all LEDs off
+ NRF_GPIO->OUTSET = (1UL << LED_BLUE); //remember that writing zeros with outset and outclear has no effect
+ NRF_GPIO->OUTSET = (1UL << LED_RED);
+ NRF_GPIO->OUTSET = (1UL << LED_GREEN);
+
+ wait(1);
+
+ button.fall(detect);
+
+ //Initialising the nRF51822
+ ble.init();
+ ble.gap().onDisconnection(disconnectionCallback);
+ ble.gap().onConnection(connectionCallback);
+
+
+ /* setup advertising */
+ ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
+ ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
+ ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
+ (const uint8_t *)"PWMtest", sizeof("PWMtest"));
+ ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
+ (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
+ DFUService dfu(ble);
+ UARTService uartService(ble);
+ uartServicePtr = &uartService;
+ //uartService.retargetStdout();
+
+ ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
+ ble.gap().startAdvertising();
+ char str[8];
+ str[5]='\r';
+ str[6]='\n';
+ str[7]='\0';
+
+ //int rgb_res = 8; //RGB resolution, TODO define this as a constant later
+ int vals[3] = {0};
+ bool pwmvals[3] = {0};
+
+
+ while (true) {
+ ble.waitForEvent();
+ str[0]=uartService._getc();//set
+ if (str[0]=='S')
+ {
+
+ str[1]=uartService._getc();//R
+ str[2]=uartService._getc();//G
+ str[3]=uartService._getc();//B
+ str[4]=uartService._getc();
+
+ vals[0] = str[1]-0x30;//convert from char to int
+ vals[1] = str[2]-0x30;
+ vals[2] = str[3]-0x30;
+ uartService.writeString(str);
+
+ str[0] = 0;
+ }
+
+ for(uint32_t j = 100000; j>0; j--)//display color for a couple seconds
+ {
+ for(int i = 8; i>0; i--)//
+ {
+ pwmvals[0] = (i - vals[0] == 0);//control brightness by turning LED on after x iterations
+ pwmvals[1] = (i - vals[1] == 0);//could compare directly to str and save an array
+ pwmvals[2] = (i - vals[2] == 0);
+ NRF_GPIO->OUTCLR = (pwmvals[0] << LED_RED)|(pwmvals[1] << LED_GREEN)|(pwmvals[2] << LED_BLUE);
+
+ }
+ NRF_GPIO->OUTSET = (0x7UL << LED_GREEN);//turn all 3 off
+ }
+ }
+}
+
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed May 11 18:29:00 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/9296ab0bfc11 \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/nRF51822.lib Wed May 11 18:29:00 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#bf85bf7e73d5
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tiny_ble.h Wed May 11 18:29:00 2016 +0000 @@ -0,0 +1,19 @@ + +#ifndef __TINY_BLE_H__ +#define __TINY_BLE_H__ + +#define LED_GREEN p21 +#define LED_RED p22 +#define LED_BLUE p23 +#define BUTTON_PIN p17 +#define BATTERY_PIN p1 + +#define MPU6050_SDA p12 +#define MPU6050_SCL p13 + +#define UART_TX p9 +#define UART_RX p11 +#define UART_CTS p8 +#define UART_RTS p10 + +#endif // __TINY_BLE_H__