Hello,
I have noticed that in the datasheet of AM243x it is mentioned that there is support for 16-bit memory in GPMC.
However when configuring the device in SysConfig, I am unable to select 16-bit and the only option is 8-bit.
See this picture below with SDK Version 9.1, CCS 12.3, SysConfig 18.0.
Thanks and regards
Manuel
Hi Manuel,
Since the NAND flash only supports 8 bit data, so the syscfg only supports 8 bit data only. Here is the GPMC PSRAM example from AM263x MCU+ SDK 09.01.00, it only supports 16 bit data, because the PSRAM uses 16 bit data.
I know the AM243x GPMC supports both 16 and 8 bit data, but the GPMC driver does not support both at this moment. However, it will in 09.02.00.
Best regards,
Ming
Hello Manuel,
Please try to do the steps below to make 16bits operations
In the current MCU+SDK example, we support 8 bit.
Currently, the 8 bit code is generated from system cfg. If possible please copy the entire generated code for GPMC to move to a new file.
In the new file, you can add 8 more pin configurations for 16 bit operations.
Below, one is configured from GPMC_AD8 to GPMC_AD15 as per the EVM SOC package .
So, you need to update pins according to your LP Package.
Next, change device type to 16bit and the remaining code should work for 16 bits as well.
Please let me know if you are facing any issues.
Regards,
Anil.
/* GPMC0_AD8 -> GPMC0_AD8 (V19) */
{
PIN_GPMC0_AD8,
( PIN_MODE(0) | PIN_INPUT_ENABLE | PIN_PULL_DISABLE )
},
/* GPMC0 pin config */
/* GPMC0_AD9 -> GPMC0_AD9 (T17) */
{
PIN_GPMC0_AD9,
( PIN_MODE(0) | PIN_INPUT_ENABLE | PIN_PULL_DISABLE )
},
/* GPMC0 pin config */
/* GPMC0_AD10 -> GPMC0_AD10 (R16) */
{
PIN_GPMC0_AD10,
( PIN_MODE(0) | PIN_INPUT_ENABLE | PIN_PULL_DISABLE )
},
/* GPMC0 pin config */
/* GPMC0_AD11 -> GPMC0_AD11 (W20) */
{
PIN_GPMC0_AD11,
( PIN_MODE(0) | PIN_INPUT_ENABLE | PIN_PULL_DISABLE )
},
/* GPMC0 pin config */
/* GPMC0_AD12 -> GPMC0_AD12 (W21) */
{
PIN_GPMC0_AD12,
( PIN_MODE(0) | PIN_INPUT_ENABLE | PIN_PULL_DISABLE )
},
/* GPMC0 pin config */
/* GPMC0_AD13 -> GPMC0_AD13 (V18) */
{
PIN_GPMC0_AD13,
( PIN_MODE(0) | PIN_INPUT_ENABLE | PIN_PULL_DISABLE )
},
/* GPMC0 pin config */
/* GPMC0_AD14 -> GPMC0_AD14 (Y21) */
{
PIN_GPMC0_AD14,
( PIN_MODE(0) | PIN_INPUT_ENABLE | PIN_PULL_DISABLE )
},
/* GPMC0 pin config */
/* GPMC0_AD15 -> GPMC0_AD15 (Y20) */
{
PIN_GPMC0_AD15,
( PIN_MODE(0) | PIN_INPUT_ENABLE | PIN_PULL_DISABLE )
},
Regards,
Anil.