6 files changed, 7 insertions, 7 deletions
diff --git a/src/drivers/Spi.cpp b/src/drivers/Spi.cpp
index ec3a5e94..bf08178d 100644
--- a/src/drivers/Spi.cpp
+++ b/src/drivers/Spi.cpp
@@ -27,7 +27,7 @@ bool Spi::Init() {
   return true;
 }
 
-bool Spi::WriteCmdAndBuffer(uint8_t *cmd, size_t cmdSize, uint8_t *data, size_t dataSize) {
+bool Spi::WriteCmdAndBuffer(const uint8_t *cmd, size_t cmdSize, const uint8_t *data, size_t dataSize) {
   return spiMaster.WriteCmdAndBuffer(pinCsn, cmd, cmdSize, data, dataSize);
 }
 
diff --git a/src/drivers/Spi.h b/src/drivers/Spi.h
index bee39af2..82ba8a65 100644
--- a/src/drivers/Spi.h
+++ b/src/drivers/Spi.h
@@ -22,7 +22,7 @@ namespace Pinetime {
         bool Init();
         bool Write(const uint8_t* data, size_t size);
         bool Read(uint8_t* cmd, size_t cmdSize, uint8_t *data, size_t dataSize);
-        bool WriteCmdAndBuffer(uint8_t* cmd, size_t cmdSize, uint8_t *data, size_t dataSize);
+        bool WriteCmdAndBuffer(const uint8_t* cmd, size_t cmdSize, const uint8_t *data, size_t dataSize);
         void Sleep();
         void Wakeup();
 
diff --git a/src/drivers/SpiMaster.cpp b/src/drivers/SpiMaster.cpp
index ff241184..8087d386 100644
--- a/src/drivers/SpiMaster.cpp
+++ b/src/drivers/SpiMaster.cpp
@@ -239,7 +239,7 @@ void SpiMaster::Wakeup() {
   Init();
 }
 
-bool SpiMaster::WriteCmdAndBuffer(uint8_t pinCsn, uint8_t *cmd, size_t cmdSize, uint8_t *data, size_t dataSize) {
+bool SpiMaster::WriteCmdAndBuffer(uint8_t pinCsn, const uint8_t *cmd, size_t cmdSize, const uint8_t *data, size_t dataSize) {
   xSemaphoreTake(mutex, portMAX_DELAY);
 
   taskToNotify = nullptr;
diff --git a/src/drivers/SpiMaster.h b/src/drivers/SpiMaster.h
index 88b37a35..cd3193e4 100644
--- a/src/drivers/SpiMaster.h
+++ b/src/drivers/SpiMaster.h
@@ -37,7 +37,7 @@ namespace Pinetime {
         bool Write(uint8_t pinCsn, const uint8_t* data, size_t size);
         bool Read(uint8_t pinCsn, uint8_t* cmd, size_t cmdSize, uint8_t *data, size_t dataSize);
 
-        bool WriteCmdAndBuffer(uint8_t pinCsn, uint8_t* cmd, size_t cmdSize, uint8_t *data, size_t dataSize);
+        bool WriteCmdAndBuffer(uint8_t pinCsn, const uint8_t* cmd, size_t cmdSize, const uint8_t *data, size_t dataSize);
 
         void OnStartedEvent();
         void OnEndEvent();
diff --git a/src/drivers/SpiNorFlash.cpp b/src/drivers/SpiNorFlash.cpp
index 8fbb53a1..7e4da1ca 100644
--- a/src/drivers/SpiNorFlash.cpp
+++ b/src/drivers/SpiNorFlash.cpp
@@ -96,12 +96,12 @@ bool SpiNorFlash::EraseFailed() {
   return (ReadSecurityRegister() & 0x40u) == 0x40u;
 }
 
-void SpiNorFlash::Write(uint32_t address, uint8_t *buffer, size_t size) {
+void SpiNorFlash::Write(uint32_t address, const uint8_t *buffer, size_t size) {
   static constexpr uint8_t cmdSize = 4;
 
   size_t len = size;
   uint32_t addr = address;
-  uint8_t* b = buffer;
+  const uint8_t* b = buffer;
   while(len > 0) {
     uint32_t pageLimit = (addr & ~(pageSize - 1u)) + pageSize;
     uint32_t toWrite = pageLimit - addr > len ? len :  pageLimit - addr;
diff --git a/src/drivers/SpiNorFlash.h b/src/drivers/SpiNorFlash.h
index b5f19202..98267c09 100644
--- a/src/drivers/SpiNorFlash.h
+++ b/src/drivers/SpiNorFlash.h
@@ -24,7 +24,7 @@ namespace Pinetime {
         bool WriteEnabled();
         uint8_t ReadConfigurationRegister();
         void Read(uint32_t address, uint8_t* buffer, size_t size);
-        void Write(uint32_t address, uint8_t *buffer, size_t size);
+        void Write(uint32_t address, const uint8_t *buffer, size_t size);
         void WriteEnable();
         void SectorErase(uint32_t sectorAddress);
         uint8_t ReadSecurityRegister();