topic Re: KSDK2.2 vs KSDK 1.3 for K22 512k in Kinetis Software Development Kit

KSDK2.2 vs KSDK 1.3 for K22 512k

HeMyFAE — Tue, 19 Sep 2017 19:57:58 GMT

Dear KSDK 2.2,

I am helping a customer migrating from KsDK1.3 to KSDK2.2.

I2c issue:

To stretch the clock in i2c slave mode, the customer was able to use the following HAL function calls in KSDK1.3 to that.

· I2C_HAL_SetBaudRate(BASEADDR, CLOCK_SYS_GetBusClockFreq(), 66, NULL);· I2C_HAL_SetSlaveBaudCtrlCmd(BASEADDR, true);

1) How would you be able to stretch the clock for I2c slave mode using KSDK2.2?

RNG issue:

The interrupt or High Assurance options in the RNG driver.SDK 1.3 supported: ·

RNGA_HAL_SetIntMaskCmd(RNG_BASE_PTR, true);· RNGA_HAL_SetHighAssuranceCmd(RNG_BASE_PTR, true);

2) How would you get do similar things with KSDK2.2?

Regards,

Re: KSDK2.2 vs KSDK 1.3 for K22 512k

danielchen — Thu, 21 Sep 2017 07:22:43 GMT

Hi Hy:

KSDK 2.x is the evolution of KSDK 1.x into a more optimized software solution. KSDK 2.x eliminates the need for a separate HAL and Peripheral Driver, replacing there two layers with a single driver for each peripheral. The single driver provides both the low-level functionality of the HAL and the non-blocking interrupt-based functionality of the Peripheral Driver.

I2C slave config , please use I2C_SlaveInit, but for i2c baud rate, it should be decided by master, it is not necessary to config baud for slave.

Ex:

I2C_SlaveInit(EXAMPLE_I2C_SLAVE_BASEADDR, &slaveConfig, I2C_SLAVE_CLK_FREQ);

For RNGA, KSDK 2.x initialized with RNGA_Init, it seems no config with HA and INITM. I will check it and get it back to you later.

Regards

Daniel

Re: KSDK2.2 vs KSDK 1.3 for K22 512k

danielchen — Fri, 22 Sep 2017 07:42:02 GMT

Hi HY:

According reference manual, Slave Baud Rate control (SBRC) is controlled by I2Cx_C2 register. If SBRC (bit 4 ) is 0 , The slave baud rate follows the master baud rate and clock stretching may occur. The default value is 0, the slave will follow master baud rate. I think for this reason, KSDK.2.2 not provide API to do that.

To do this, it is also easy, just clear the SBRC bit from I2Cx_C2. You can refer to KSDK 1.3, you can control the register directly.

/*! @brief Set the SBRC field to a new value. */
#define I2C_WR_C2_SBRC(base, value) (I2C_RMW_C2(base, I2C_C2_SBRC_MASK, I2C_C2_SBRC(value)))
#define I2C_BWR_C2_SBRC(base, value) (BITBAND_ACCESS8(&I2C_C2_REG(base), I2C_C2_SBRC_SHIFT) = (value))

Regards

Daniel

Re: KSDK2.2 vs KSDK 1.3 for K22 512k

danielchen — Fri, 22 Sep 2017 08:28:34 GMT

Hi Hy Mai

For RNGA issue, KSDK 2.x RNGA driver doesn't provide this interface, customer should set these bits directly by using register macros.

RNG->CR |= RNG_CR_HA_MASK | RNG_CR_INTM_MASK;

Have a great day,
Daniel

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