MSP430, CCS, SPI, at45dbxx data flash

MSP430, CCS, SPI, at45dbxx data flash

※ msp430.h 를 사용하는 소스입니다.

SPI 3개 핀 (MISO, MOSI, SCK)을 사용하여 동작하도록 하였습니다.

CS 핀은 별도로 제어합니다.

1. use spi interface
- UCA0
- P1.4 : Chip Select
- P1.5 : Serial Clock Out (UCA0CLK)
- P1.6 : Reset
- P2.0 : Data Out (UCA0SIMO)
- P2.1 : Data In (UCA0SOMI)

2. msp430fr6989 development kit backchannel (uart)
- use USCI_A1
- P3.5 : UCA1RXD
- P3.4 : UCA1TXD
- BaudRate : 115200

Did you have a look at the example codes for the MCU that is provided by TI for almost every processor?

www.ti.com/lit/zip/slac536

The following examples show how to set up the clocks:

msp430fr59xx_cs_01.c       Configure MCLK for 8MHz operation
msp430fr59xx_cs_02.c       Configure MCLK for 16MHz operation
msp430fr59xx_cs_03.c       Output 32768Hz crystal on XT1 and observe failsafe
msp430fr59xx_cs_04.c       ACLK = XT1 = 32768Hz, SMCLK= XT2 = 8MHz, MCLK = DCO
msp430fr59xx_cs_05.c       Using LFXT in bypass mode, failsafe operation shown

0. 참고 사항

• C:\ti\msp\MSP430Ware_3_80_04_05\examples\devices\MSP430FR5xx_6xx\MSP430FR5x8x_MSP430FR692x_MSP430FR6x7x_MSP430FR6x8x_Code_Examples\C
  
• http://e2e.ti.com/support/microcontrollers/msp430/f/166/p/368560/1297094
• https://github.com/achopra6/MSP430FR6989/blob/master/timer.c
• http://www.ti.com/lit/ds/symlink/msp430fr6989.pdf
• http://www.ti.com/lit/ug/slau367o/slau367o.pdf

출처: http://coyoteugly.tistory.com/188 [마이콤 개발자를 위한 여행]

0. 참고 사항

• [MSP430Ware] / msp430fr69xx_eusci_spi_standard_master.c
  
• [MSP430Ware] / www.ti.com/lit/zip/slac536
  
• [MSP430FR6989 LaunchPad™ Development Kit] / http://www.ti.com/lit/ug/slau627a/slau627a.pdf
• [MSP430FR6989 DataSheet] / http://www.ti.com/lit/ds/symlink/msp430fr6989.pdf
• [MSP430FR6xx User's Guide] / http://www.ti.com/lit/ug/slau367o/slau367o.pdf

1. 보드 연결

2. 소스 설명

full 소스는 아래 github를 통해 확인하세요.

CS 핀은 별도로 제어하기 때문에 SPI 구성에서 제외하였습니다.     // Configure SPI     //P1SEL0 &= ~(BIT5 | BIT4);                 // Configure slave select and clk     //P1SEL1 |= BIT5 | BIT4;     P1SEL0 &= ~(BIT5);                 // Configure slave select and clk     P1SEL1 |= BIT5;

example 소스가 1 byte TX 후에 RX가 동작합니다. 따라서 n byte TX 후에 RX를 하도록 수정하였습니다.                 case TX_REG_ADDRESS_MODE:                     if (RXByteCtr)                     {                         if (--TXByteCtr > 0) // add by sglee                         {                             MasterMode = TX_REG_ADDRESS_MODE;                             SendUCA0Data(TransmitBuffer[TransmitIndex++]);                             break;                         }                         MasterMode = RX_DATA_MODE;   // Need to start receiving now                         //Send Dummy To Start                         //__delay_cycles(2000000);                         //__delay_cycles(16000); // 100us, 160=1us, not needed by sglee                         SendUCA0Data(DUMMY);                     }                     else                     {                         MasterMode = TX_DATA_MODE;        // Continue to transmision with the data in Transmit Buffer                         //Send First                         SendUCA0Data(TransmitBuffer[TransmitIndex++]);                         TXByteCtr--;                     }                     break;

3. 소스

• https://github.com/sglee0223/msp430/tree/master/at45dbxx_spi
  

4. 결과