2023-10-26 02:07 AM
Hi, I've developed a custom ExternalLoader for STM32U575VGT6Q installed on my board, following the online guides provided by ST, obtaining a fully functional version. On the new version of the board I have an STM32U545VET6Q, so in ExternalLoader project I've carried out the necessary porting for the new micro pinout, and the memory was replaced with a larger one but with the same interface.
On the new version of the board with STM32U545VET6Q, my ExternalLoader has been successfully tested in debug, both in reading and writing, but it does not work when launched from CubeProgrammer (with both versions 2.13 and 2.14 of CubeProg, the only ones that support U545). I attach the CubeProgrammer logs in the two cases, obtained with Verbosity Level 3. I've tried to read small portions of the external flash, but the CubeProgrammer interface always shows the error message when reading (same behavior for writing).
From the logs (the figure below shows an extract of the reading procedure for both micros) I've noticed that in the case of the U545 it seems that the ExtLoader binary is not loaded into RAM, unlike what happens on the U575 (lines 97-99 of the U575 log, absent in U545). Following this (and probably related to the previous problem..) the Main Stack Pointer of U575 seems to point to a coherent memory location, while on U545 it points to zero.
Does anyone have any suggestions on this?
Thank you
2023-11-07 09:23 AM - edited 2023-11-17 08:33 PM
Ended up pulling from Newark(Farnell/Avnet) UK warehouse stock. No idea for absence from US suppliers, but should get boards next week.
// NUCLEO-U545
// PC0 AF3 IO7 CN7.38
// PC1 AF10 IO4 CN7.36
// PC2 AF10 IO5 CN7.35
// PC3 AF10 IO6 CN7.37
// PA0 AF10 NCS CN7.28
// PA1 AF10 DQS CN7.30
// PA2 AF10 NCS CN10.35 ARD UART? SB35/SB37
// PA3 AF10 CLK CN10.37 ARD UART?
// PA4 AF3 NCS CN7.32
// PA6 AF10 IO3 CN10.13
// PA7 AF10 IO2 CN10.15
// PB0 AF10 IO1 CN7.34
// PB1 AF10 IO0 CN10.24
// PB2 AF10 DQS CN10.24
// PB10 AF10 CLK CN10.15
// PA12 AF6 NCS CN10.12 USB?
// PC11 AF5 NCS CN7.2
// PB5 AF3 NCLK CN10.29
2023-11-17 05:33 AM
Hi @Tesla DeLorean,
I'm thinking about possible problems caused by the different RAM organization of the two microcontrollers.. any news from your side? Thanks
2023-11-17 08:24 AM
I have a couple of NUCLEO-U545RE-Q in hand, need to wire up a harness to a SOIC-16 ZIF socket.
I did build a tentative U545 loader off the U599 fork. Things I learned there, No OSPIM, No GPIOF, No OCTOSPI2
External Loader size less than 7KB, was successfully loaded by STM32 Cube Programmer V2.14 into RAM, and Init() called. Failed due to lack of physically attached QSPI device, and perhaps other bugs to-be-determined
10:11:57:102 : UPLOADING ...
10:11:57:103 : Size : 1024 Bytes
10:11:57:103 : Address : 0x90000000
10:11:57:103 : Read progress:
10:11:57:104 : Reading data...
10:11:57:104 : halt ap 0
10:11:57:104 : w ap 0 reg 15 PC (0x20000000)
10:11:57:104 : w ap 0 reg 17 MSP (0x20000500)
10:11:57:104 : w ap 0 reg 16 xPSR (0x01000000)
10:11:57:104 : w ap 0 @0x20001AC0 : 0x00000200 bytes, Data 0x00000000...
10:11:57:104 : w ap 0 @0x20000000 : 0x00000004 bytes, Data 0x0000BE00...
10:11:57:144 : w ap 0 @0x20000004 : 0x0000168C bytes, Data 0x4000F080...
10:11:57:144 : Loader read...
10:11:57:144 : Init flashloader...
10:11:57:145 : halt ap 0
10:11:57:145 : w ap 0 reg 0 R0 0x00000000
10:11:57:145 : w ap 0 reg 1 R1 0x00000000
10:11:57:145 : w ap 0 reg 2 R2 0x00000000
10:11:57:145 : w ap 0 reg 3 R3 0x00000000
10:11:57:145 : w ap 0 reg 4 R4 0x00000000
10:11:57:146 : w ap 0 reg 5 R5 0x00000000
10:11:57:146 : w ap 0 reg 6 R6 0x00000000
10:11:57:146 : w ap 0 reg 7 R7 0x00000000
10:11:57:146 : w ap 0 reg 8 R8 0x00000000
10:11:57:146 : w ap 0 reg 9 R9 0x00000000
10:11:57:146 : w ap 0 reg 10 R10 0x00000000
10:11:57:146 : w ap 0 reg 11 R11 0x00000000
10:11:57:146 : w ap 0 reg 12 R12 0x00000000
10:11:57:147 : w ap 0 reg 13 SP 0x00000000
10:11:57:147 : w ap 0 reg 14 LR 0x20000001
10:11:57:147 : w ap 0 reg 15 PC 0x200007F5
10:11:57:147 : w ap 0 reg 16 xPSR 0x01000000
10:11:57:147 : w ap 0 reg 17 MSP 0x20001A8C
10:11:57:147 : w ap 0 reg 18 PSP 0x00000000
10:11:57:147 : run ap 0
10:11:57:148 : halt ap 0
10:11:57:148 : r ap 0 reg 0 R0 0x00000000
10:11:57:148 : Init function fail
10:11:57:148 : r ap 0 reg 16 xPSR 0x41000000
10:11:57:149 : halt ap 0
10:11:57:149 : w ap 0 reg 15 PC (0x20000000)
10:11:57:149 : w ap 0 reg 17 MSP (0x20000500)
10:11:57:149 : w ap 0 reg 16 xPSR (0x01000000)
10:11:57:149 : Error: Data read failed
2023-11-17 06:26 PM - edited 2023-11-18 05:38 AM
Built the fixture this evening, and tested/validated with a Winbond W25Q256 loader
Looks like I have access to enough pins to facilitate OCTO on something like a Macronix MX25LM51245G
PB10:AF10 CLK
PA4:AF3 NCS
PB1:AF10 IO0
PB0:AF10 IO1
PA7:AF10 IO2
PA6:AF10 IO3
PC1:AF10 IO4
PC2:AF10 IO5
PC3:AF10 IO6
PC0:AF3 IO7
PB2:AF10 DQS