which pins are to used for Lat & DR in stm32 bluepill

[Suresh6060]

The sketch mentions
#define DMD_PIN_A PA1
#define DMD_PIN_B PA4
#define DMD_PIN_nOE PB1
//#define DMD_PIN_nOE PA6
#define DMD_PIN_SCLK PA15 // may have to change to PA0 as another user mentioned
//#define DMD_PIN_SCLK PB4

DMD_MonoChrome_SPI dmd(DMD_PIN_A, DMD_PIN_B, DMD_PIN_nOE, DMD_PIN_SCLK, DISPLAYS_ACROSS, DISPLAYS_DOWN, dmd_spi, ENABLE_DUAL_BUFFER);

I could not understand which pins of bluepill are connected to LAT & Dr Given that the p10 monochrome HUB12 board has

OE , A, B, CLK, LAT & DR pins to be connected

I assume

OE to be connected to PB1
A to be connected to PA1
B to connected to PA4
CLK to be connected to PA15 or is it PA0 ?
LAT to be connected to ?
DR to be connected to ?

IF LAT is to be connected to PA15 / PA0 the which PIN is connected to CLK ? & offcourse DR ?

Further ,

#if defined(DMD_PARA)
#else
#end if

is given. However I do not find any place to specify for initializing DMD as DMD_PARA or SPI . Or is it simply commenting out unused one ?

Thank you & rgds

[board707]

I could not understand which pins of bluepill are connected to LAT & Dr

Hi
For compatibility reason the LAT signal is called a SCLK here. So you have these pins: A, B, SCLK(LAT), nOE, Rdata & CLK.
The first four are defined in code:

#define DMD_PIN_A PA1
#define DMD_PIN_B PA4
#define DMD_PIN_nOE PB1
#define DMD_PIN_SCLK PA15

The last two, RDATA and CLK, are depends on SPI channel number, because CLK must be SPI SCK and DATA should be a SPI MOSI.
On STM32F103 boards it will be A5 A7 in the case of SPI (1) or PB13 PB15 for SPI (2), respectively.

See details in Wiki
https://github.com/board707/DMD_STM32/wiki/Connections---Monochrome
and
https://github.com/board707/DMD_STM32/wiki/quick_start#using-monochrome-panels

Edited - the correct pins should be SPI SCK and SPI MOSI

[Suresh6060]

Thank you very much for the clarification.