From 8227fba4e8ae69c821625a81ebd398f31ab5e7c5 Mon Sep 17 00:00:00 2001
From: Ciprian Regus <ciprian.regus@analog.com>
Date: Tue, 22 Aug 2023 10:10:44 +0300
Subject: [PATCH] wip

---
 drivers/platform/maxim/max32650/maxim_spi.c   | 49 ++++---------------
 .../src/examples/iio_example/iio_example.c    |  2 +-
 tools/scripts/maxim.mk                        |  2 +-
 3 files changed, 12 insertions(+), 41 deletions(-)

diff --git a/drivers/platform/maxim/max32650/maxim_spi.c b/drivers/platform/maxim/max32650/maxim_spi.c
index d6aa0176a3d..d71b8df7b11 100644
--- a/drivers/platform/maxim/max32650/maxim_spi.c
+++ b/drivers/platform/maxim/max32650/maxim_spi.c
@@ -67,22 +67,6 @@
 /************************ Functions Definitions *******************************/
 /******************************************************************************/
 
-volatile uint32_t dma_done = 0;
-
-void DMA0_IRQHandler(void)
-{
-	MXC_DMA_ChannelClearFlags(0, 0xFF);
-	// MXC_DMA_Handler();
-	dma_done = 1;
-}
-
-void DMA1_IRQHandler(void)
-{
-	MXC_DMA_ChannelClearFlags(1, 0xFF);
-	// MXC_DMA_Handler();
-	dma_done = 1;
-}
-
 /**
  * @brief Configure the VDDIO level for a SPI interface
  * @param desc - the SPI descriptor
@@ -312,9 +296,6 @@ static int _max_spi_config(struct no_os_spi_desc *desc)
 		goto err_init;
 	}
 
-	// NVIC_EnableIRQ(DMA0_IRQn);
-	// NVIC_EnableIRQ(DMA1_IRQn);
-
 	return 0;
 err_init:
 	MXC_SPI_Shutdown(MXC_SPI_GET_SPI(desc->device_id));
@@ -420,14 +401,14 @@ int32_t max_spi_transfer(struct no_os_spi_desc *desc,
 
 	spi = MXC_SPI_GET_SPI(desc->device_id);
 
-	// slave_id = desc->chip_select;
-	// if (slave_id != last_slave_id[desc->device_id]) {
-	// 	ret = _max_spi_config(desc);
-	// 	if (ret)
-	// 		return ret;
+	slave_id = desc->chip_select;
+	if (slave_id != last_slave_id[desc->device_id]) {
+		ret = _max_spi_config(desc);
+		if (ret)
+			return ret;
 
-	// 	last_slave_id[desc->device_id] = slave_id;
-	// }
+		last_slave_id[desc->device_id] = slave_id;
+	}
 
 	req.spi = MXC_SPI_GET_SPI(desc->device_id);
 	req.ssIdx = desc->chip_select;
@@ -441,25 +422,15 @@ int32_t max_spi_transfer(struct no_os_spi_desc *desc,
 		req.rxLen = req.rxData ? msgs[i].bytes_number : 0;
 		req.completeCB = NULL;
 
-		//_max_delay_config(desc, &msgs[i]);
-		if (msgs[i].use_dma && msgs[i].bytes_number >= 16) {
-			MXC_DMA_ReleaseChannel(0);
-			MXC_DMA_ReleaseChannel(1);
-			ret = MXC_SPI_MasterTransactionDMA(&req);
-
-			while (!dma_done);
-			dma_done = 0;
-		}
-		else {
-			ret = MXC_SPI_MasterTransaction(&req);
-		}
+		_max_delay_config(desc, &msgs[i]);
 
+		ret = MXC_SPI_MasterTransaction(&req);
 		if (ret == E_BAD_PARAM)
 			return -EINVAL;
 		if (ret == E_BAD_STATE)
 			return -EBUSY;
 
-		//no_os_udelay(msgs[i].cs_change_delay);
+		no_os_udelay(msgs[i].cs_change_delay);
 	}
 
 	return 0;
diff --git a/projects/swiot/src/examples/iio_example/iio_example.c b/projects/swiot/src/examples/iio_example/iio_example.c
index e7e32711de2..83c09c1f845 100644
--- a/projects/swiot/src/examples/iio_example/iio_example.c
+++ b/projects/swiot/src/examples/iio_example/iio_example.c
@@ -478,7 +478,7 @@ int iio_example_main()
 	// ret = Ext_Flash_Read(0x0, flash_readback, 3, Ext_Flash_DataLine_Single);
 	// ret = Ext_Flash_Read(0x0, flash_readback, 3, Ext_Flash_DataLine_Single);
 
-	func_ram1 = (void(*)(void))((uint32_t)&__load_start_xip | 1);
+	func_ram1 = (void(*)(void))((uint32_t)&__load_start_xip);
 	func_ram1();
 
 	// ret = Ext_Flash_Program_Page(0xF, flash_val, 3, Ext_Flash_DataLine_Quad);
diff --git a/tools/scripts/maxim.mk b/tools/scripts/maxim.mk
index 8370e02a879..2ad173385d8 100644
--- a/tools/scripts/maxim.mk
+++ b/tools/scripts/maxim.mk
@@ -71,7 +71,7 @@ LDFLAGS = -mcpu=cortex-m4 	\
 	
 CFLAGS += -mthumb                                                               \
         -mcpu=cortex-m4                                                         \
-	-O0								\
+	-O2								\
         -mfloat-abi=hard                                                        \
         -mfpu=fpv4-sp-d16                                                       \
         -Wa,-mimplicit-it=thumb                                                 \