Posted on April 26, 2011 at 15:10
Actually I also tested with NSS software management mode, but the result was same unless I controled PE5(SPI_NSS Pin) manually. Is there something configuration that I missed? I would be glad if you could give any ideas or advice about this subject. Thank you,
Hi all,
Is there anyone who can give me some advice about the STM8S SPI? I tried to setup STM8S105 as the SPI master mode with the hardware slave select management mode which is transmit only mode. Here my source code is below: /*High speed internal clock prescaler: 1, Fmaster = 16MHz */ CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); CLK_PeripheralClockConfig(CLK_PERIPHERAL_SPI, ENABLE); /* Initialize SPI */ SPI_DeInit(); /* Initialize SPI in Master mode */ SPI_Init(SPI_FIRSTBIT_MSB, SPI_BAUDRATEPRESCALER_8, SPI_MODE_MASTER, SPI_CLOCKPOLARITY_HIGH, SPI_CLOCKPHASE_2EDGE, SPI_DATADIRECTION_1LINE_TX, SPI_NSS_HARD, 0x07); /*Enable the SPI */ SPI_Cmd(ENABLE); /*Send data form a master to a slave */ while (SPI_GetFlagStatus(SPI_FLAG_TXE)== RESET); SPI->DR = Data; When I send data NSS signal is not going down but staying on high as below a picture. Actually I also tested with NSS software management mode, but the result was same unless I controled PE5(SPI_NSS Pin) manually. Is there something configuration that I missed? I would be glad if you could give any ideas or advice about this subject. Thank you,
