Add SPI NOR Flash driver, WIP.

src/drivers/Spi.cpp

@@ -0,0 +1,29 @@
+#include <hal/nrf_gpio.h>
+#include "Spi.h"
+
+using namespace Pinetime::Drivers;
+
+Spi::Spi(SpiMaster& spiMaster, uint8_t pinCsn) :
+        spiMaster{spiMaster}, pinCsn{pinCsn} {
+
+}
+
+bool Spi::Write(const uint8_t *data, size_t size) {
+  return spiMaster.Write(pinCsn, data, size);
+}
+
+bool Spi::Read(uint8_t *data, size_t size) {
+  return spiMaster.Read(pinCsn, data, size);
+}
+
+void Spi::Sleep() {
+  // TODO sleep spi
+  nrf_gpio_cfg_default(pinCsn);
+}
+
+bool Spi::Init() {
+  nrf_gpio_pin_set(pinCsn); /* disable Set slave select (inactive high) */
+  return true;
+}
+
+

src/drivers/Spi.h

@@ -0,0 +1,33 @@
+#pragma once
+#include <FreeRTOS.h>
+#include <cstdint>
+#include <cstddef>
+#include <array>
+#include <atomic>
+#include <task.h>
+
+#include "BufferProvider.h"
+#include "SpiMaster.h"
+
+namespace Pinetime {
+  namespace Drivers {
+    class Spi {
+      public:
+        Spi(SpiMaster& spiMaster, uint8_t pinCsn);
+        Spi(const Spi&) = delete;
+        Spi& operator=(const Spi&) = delete;
+        Spi(Spi&&) = delete;
+        Spi& operator=(Spi&&) = delete;
+
+        bool Init();
+        bool Write(const uint8_t* data, size_t size);
+        bool Read(uint8_t* data, size_t size);
+        void Sleep();
+        void Wakeup();
+
+      private:
+        SpiMaster& spiMaster;
+        uint8_t pinCsn;
+    };
+  }
+}

src/drivers/SpiMaster.cpp

@@ -19,8 +19,8 @@ bool SpiMaster::Init() {
   nrf_gpio_pin_clear(params.pinMOSI);
   nrf_gpio_cfg_output(params.pinMOSI);
   nrf_gpio_cfg_input(params.pinMISO, NRF_GPIO_PIN_NOPULL);
-  nrf_gpio_cfg_output(params.pinCSN);
-  pinCsn = params.pinCSN;
+//  nrf_gpio_cfg_output(params.pinCSN);
+//  pinCsn = params.pinCSN;
 
   switch(spi) {
     case SpiModule::SPI0: spiBaseAddress = NRF_SPIM0; break;
@@ -32,7 +32,6 @@ bool SpiMaster::Init() {
   spiBaseAddress->PSELSCK  = params.pinSCK;
   spiBaseAddress->PSELMOSI = params.pinMOSI;
   spiBaseAddress->PSELMISO = params.pinMISO;
-  nrf_gpio_pin_set(pinCsn); /* disable Set slave select (inactive high) */
 
   uint32_t frequency;
   switch(params.Frequency) {
@@ -122,7 +121,7 @@ void SpiMaster::OnEndEvent() {
       portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
     }
 
-    nrf_gpio_pin_set(pinCsn);
+    nrf_gpio_pin_set(this->pinCsn);
   }
 }
 
@@ -140,20 +139,33 @@ void SpiMaster::PrepareTx(const volatile uint32_t bufferAddress, const volatile
   spiBaseAddress->EVENTS_END = 0;
 }
 
-bool SpiMaster::Write(const uint8_t *data, size_t size) {
+void SpiMaster::PrepareRx(const volatile uint32_t bufferAddress, const volatile size_t size) {
+  spiBaseAddress->TXD.PTR = 0;
+  spiBaseAddress->TXD.MAXCNT = 0;
+  spiBaseAddress->TXD.LIST = 0;
+  spiBaseAddress->RXD.PTR = bufferAddress;
+  spiBaseAddress->RXD.MAXCNT = size;
+  spiBaseAddress->RXD.LIST = 0;
+  spiBaseAddress->EVENTS_END = 0;
+}
+
+
+bool SpiMaster::Write(uint8_t pinCsn, const uint8_t *data, size_t size) {
   if(data == nullptr) return false;
   taskToNotify = xTaskGetCurrentTaskHandle();
   while(busy) {
     asm("nop");
   }
 
+  this->pinCsn = pinCsn;
+
   if(size == 1) {
     SetupWorkaroundForFtpan58(spiBaseAddress, 0,0);
   } else {
     DisableWorkaroundForFtpan58(spiBaseAddress, 0, 0);
   }
 
-  nrf_gpio_pin_clear(pinCsn);
+  nrf_gpio_pin_clear(this->pinCsn);
 
   currentBufferAddr = (uint32_t)data;
   currentBufferSize = size;
@@ -173,6 +185,33 @@ bool SpiMaster::Write(const uint8_t *data, size_t size) {
   return true;
 }
 
+bool SpiMaster::Read(uint8_t pinCsn, uint8_t *data, size_t size) {
+  while(busy) {
+    asm("nop");
+  }
+  taskToNotify = nullptr;
+
+  this->pinCsn = pinCsn;
+  SetupWorkaroundForFtpan58(spiBaseAddress, 0,0);
+
+  nrf_gpio_pin_clear(this->pinCsn);
+
+  currentBufferAddr = 0;
+  currentBufferSize = 0;
+  busy = true;
+
+  PrepareRx((uint32_t)data, size);
+  spiBaseAddress->TASKS_START = 1;
+
+  while (spiBaseAddress->EVENTS_END == 0);
+  nrf_gpio_pin_set(this->pinCsn);
+
+  busy = false;
+
+  return true;
+}
+
+
 void SpiMaster::Sleep() {
   while(spiBaseAddress->ENABLE != 0) {
     spiBaseAddress->ENABLE = (SPIM_ENABLE_ENABLE_Disabled << SPIM_ENABLE_ENABLE_Pos);
@@ -180,7 +219,6 @@ void SpiMaster::Sleep() {
   nrf_gpio_cfg_default(params.pinSCK);
   nrf_gpio_cfg_default(params.pinMOSI);
   nrf_gpio_cfg_default(params.pinMISO);
-  nrf_gpio_cfg_default(params.pinCSN);
 }
 
 void SpiMaster::Wakeup() {
@@ -188,3 +226,4 @@ void SpiMaster::Wakeup() {
 }
 
 
+

src/drivers/SpiMaster.h

@@ -22,7 +22,6 @@ namespace Pinetime {
           uint8_t pinSCK;
           uint8_t pinMOSI;
           uint8_t pinMISO;
-          uint8_t pinCSN;
         };
 
         SpiMaster(const SpiModule spi, const Parameters& params);
@@ -32,7 +31,8 @@ namespace Pinetime {
         SpiMaster& operator=(SpiMaster&&) = delete;
 
         bool Init();
-        bool Write(const uint8_t* data, size_t size);
+        bool Write(uint8_t pinCsn, const uint8_t* data, size_t size);
+        bool Read(uint8_t pinCsn, uint8_t* data, size_t size);
 
         void OnStartedEvent();
         void OnEndEvent();
@@ -44,6 +44,7 @@ namespace Pinetime {
         void SetupWorkaroundForFtpan58(NRF_SPIM_Type *spim, uint32_t ppi_channel, uint32_t gpiote_channel);
         void DisableWorkaroundForFtpan58(NRF_SPIM_Type *spim, uint32_t ppi_channel, uint32_t gpiote_channel);
         void PrepareTx(const volatile uint32_t bufferAddress, const volatile size_t size);
+        void PrepareRx(const volatile uint32_t bufferAddress, const volatile size_t size);
 
         NRF_SPIM_Type *  spiBaseAddress;
         uint8_t pinCsn;

src/drivers/SpiNorFlash.cpp

@@ -0,0 +1,36 @@
+#include <hal/nrf_gpio.h>
+#include <libraries/delay/nrf_delay.h>
+#include <libraries/log/nrf_log.h>
+#include "SpiNorFlash.h"
+#include "Spi.h"
+
+using namespace Pinetime::Drivers;
+
+SpiNorFlash::SpiNorFlash(Spi& spi) : spi{spi} {
+
+}
+
+void SpiNorFlash::Init() {
+  uint8_t cmd = 0x9F;
+  spi.Write(&cmd, 1);
+
+  uint8_t data[3];
+  data[0] = 0;
+  data[1] = 0;
+  data[2] = 0;
+  spi.Read(data, 3);
+
+  NRF_LOG_INFO("Manufacturer : %d, Device : %d", data[0], (data[1] + (data[2]<<8)));
+}
+
+void SpiNorFlash::Uninit() {
+
+}
+
+void SpiNorFlash::Sleep() {
+
+}
+
+void SpiNorFlash::Wakeup() {
+
+}

src/drivers/SpiNorFlash.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <cstddef>
+
+namespace Pinetime {
+  namespace Drivers {
+    class Spi;
+    class SpiNorFlash {
+      public:
+        explicit SpiNorFlash(Spi& spi);
+        SpiNorFlash(const SpiNorFlash&) = delete;
+        SpiNorFlash& operator=(const SpiNorFlash&) = delete;
+        SpiNorFlash(SpiNorFlash&&) = delete;
+        SpiNorFlash& operator=(SpiNorFlash&&) = delete;
+
+        void Init();
+        void Uninit();
+
+
+        void Sleep();
+        void Wakeup();
+      private:
+        Spi& spi;
+
+    };
+  }
+}
+
+

src/drivers/St7789.cpp

@@ -1,16 +1,17 @@
 #include <hal/nrf_gpio.h>
 #include <libraries/delay/nrf_delay.h>
 #include "St7789.h"
-#include "SpiMaster.h"
+#include "Spi.h"
 
 using namespace Pinetime::Drivers;
 
-St7789::St7789(SpiMaster &spiMaster, uint8_t pinDataCommand) : spi{spiMaster}, pinDataCommand{pinDataCommand} {
+St7789::St7789(Spi &spi, uint8_t pinDataCommand) : spi{spi}, pinDataCommand{pinDataCommand} {
 
 }
 
 
 void St7789::Init() {
+  spi.Init();
   nrf_gpio_cfg_output(pinDataCommand);
   nrf_gpio_cfg_output(26);
   nrf_gpio_pin_set(26);
@@ -173,11 +174,11 @@ void St7789::HardwareReset() {
 void St7789::Sleep() {
   SleepIn();
   nrf_gpio_cfg_default(pinDataCommand);
-  spi.Sleep();
+//  spi.Sleep(); // TODO sleep SPI
 }
 
 void St7789::Wakeup() {
-  spi.Wakeup();
+//  spi.Wakeup(); // TODO wake up SPI
 
   nrf_gpio_cfg_output(pinDataCommand);
   // TODO why do we need to reset the controller?

src/drivers/St7789.h

@@ -3,10 +3,10 @@
 
 namespace Pinetime {
   namespace Drivers {
-    class SpiMaster;
+    class Spi;
     class St7789 {
       public:
-        explicit St7789(SpiMaster& spiMaster, uint8_t pinDataCommand);
+        explicit St7789(Spi& spi, uint8_t pinDataCommand);
         St7789(const St7789&) = delete;
         St7789& operator=(const St7789&) = delete;
         St7789(St7789&&) = delete;
@@ -29,7 +29,7 @@ namespace Pinetime {
         void Sleep();
         void Wakeup();
       private:
-        SpiMaster& spi;
+        Spi& spi;
         uint8_t pinDataCommand;
         uint8_t verticalScrollingStartAddress = 0;