Merge pull request #9940 from davidsaada/david_psoc6_reduce_prog_size

Reduce flash page size from 512 to 32 bytes in PSOC6 based boards

Author: Cruz Monrreal

targets/TARGET_Cypress/TARGET_PSOC6/flash_api.c

@@ -47,10 +47,27 @@ int32_t flash_program_page(flash_t *obj, uint32_t address, const uint8_t *data,
 {
     (void)(obj);
     int32_t status = 0;
-    if (Cy_Flash_ProgramRow(address, (const uint32_t *)data) != CY_FLASH_DRV_SUCCESS) {
-        status = -1;
+    static uint8_t prog_buf[CY_FLASH_SIZEOF_ROW];
+    while (size) {
+        uint32_t offset = address % CY_FLASH_SIZEOF_ROW;
+        uint32_t chunk_size;
+        if (offset + size > CY_FLASH_SIZEOF_ROW) {
+            chunk_size = CY_FLASH_SIZEOF_ROW - offset;
+        } else {
+            chunk_size = size;
+        }
+        uint32_t row_address = address / CY_FLASH_SIZEOF_ROW * CY_FLASH_SIZEOF_ROW;
+        memcpy(prog_buf, (const void *)row_address, CY_FLASH_SIZEOF_ROW);
+        memcpy(prog_buf + offset, data, chunk_size);
+
+        if (Cy_Flash_ProgramRow(row_address, (const uint32_t *)prog_buf) != CY_FLASH_DRV_SUCCESS) {
+            status = -1;
+        }
+        address += chunk_size;
+        size -= chunk_size;
     }
 
+    Cy_SysLib_ClearFlashCacheAndBuffer();
     return status;
 }
 
@@ -67,7 +84,7 @@ uint32_t flash_get_sector_size(const flash_t *obj, uint32_t address)
 uint32_t flash_get_page_size(const flash_t *obj)
 {
     (void)(obj);
-    return CY_FLASH_SIZEOF_ROW;
+    return CY_FLASH_EFFECTIVE_PAGE_SIZE;
 }
 
 uint32_t flash_get_start_address(const flash_t *obj)

targets/TARGET_Cypress/TARGET_PSOC6/psoc6pdl/drivers/include/cy_flash.h

@@ -377,6 +377,8 @@ extern "C" {
 
 /** Flash row size */
 #define CY_FLASH_SIZEOF_ROW                (CPUSS_FLASHC_PA_SIZE * 4u)
+/** Flash effective page size */
+#define CY_FLASH_EFFECTIVE_PAGE_SIZE       32
 /** Long words flash row size */
 #define CY_FLASH_SIZEOF_ROW_LONG_UNITS     (CY_FLASH_SIZEOF_ROW / sizeof(uint32_t))
 

targets/TARGET_Cypress/TARGET_PSOC6_FUTURE/device/drivers/peripheral/flash/cy_flash.h

@@ -332,6 +332,8 @@ extern "C" {
 
 /** Flash row size */
 #define CY_FLASH_SIZEOF_ROW                (CPUSS_FLASHC_PA_SIZE * 4u)
+/** Flash effective page size */
+#define CY_FLASH_EFFECTIVE_PAGE_SIZE       32
 /** Number of flash rows */
 #define CY_FLASH_NUMBER_ROWS               (CY_FLASH_SIZE / CY_FLASH_SIZEOF_ROW)
 /** Long words flash row size */

targets/TARGET_Cypress/TARGET_PSOC6_FUTURE/flash_api.c

@@ -47,10 +47,27 @@ int32_t flash_program_page(flash_t *obj, uint32_t address, const uint8_t *data,
 {
     (void)(obj);
     int32_t status = 0;
-    if (Cy_Flash_ProgramRow(address, (const uint32_t *)data) != CY_FLASH_DRV_SUCCESS) {
-        status = -1;
+    static uint8_t prog_buf[CY_FLASH_SIZEOF_ROW];
+    while (size) {
+        uint32_t offset = address % CY_FLASH_SIZEOF_ROW;
+        uint32_t chunk_size;
+        if (offset + size > CY_FLASH_SIZEOF_ROW) {
+            chunk_size = CY_FLASH_SIZEOF_ROW - offset;
+        } else {
+            chunk_size = size;
+        }
+        uint32_t row_address = address / CY_FLASH_SIZEOF_ROW * CY_FLASH_SIZEOF_ROW;
+        memcpy(prog_buf, (const void *)row_address, CY_FLASH_SIZEOF_ROW);
+        memcpy(prog_buf + offset, data, chunk_size);
+
+        if (Cy_Flash_ProgramRow(row_address, (const uint32_t *)prog_buf) != CY_FLASH_DRV_SUCCESS) {
+            status = -1;
+        }
+        address += chunk_size;
+        size -= chunk_size;
     }
 
+    Cy_SysLib_ClearFlashCacheAndBuffer();
     return status;
 }
 
@@ -67,7 +84,7 @@ uint32_t flash_get_sector_size(const flash_t *obj, uint32_t address)
 uint32_t flash_get_page_size(const flash_t *obj)
 {
     (void)(obj);
-    return CY_FLASH_SIZEOF_ROW;
+    return CY_FLASH_EFFECTIVE_PAGE_SIZE;
 }
 
 uint32_t flash_get_start_address(const flash_t *obj)